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Yang, H. In Vitro Maturation (IVM) of Human Oocyte. Encyclopedia. Available online: (accessed on 06 December 2023).
Yang H. In Vitro Maturation (IVM) of Human Oocyte. Encyclopedia. Available at: Accessed December 06, 2023.
Yang, Huixia. "In Vitro Maturation (IVM) of Human Oocyte" Encyclopedia, (accessed December 06, 2023).
Yang, H.(2021, December 24). In Vitro Maturation (IVM) of Human Oocyte. In Encyclopedia.
Yang, Huixia. "In Vitro Maturation (IVM) of Human Oocyte." Encyclopedia. Web. 24 December, 2021.
In Vitro Maturation (IVM) of Human Oocyte

The clinical human oocyte IVM refers to in vitro maturation of the immature oocytes retrieved from follicles after no follicle stimulating hormone (FSH) or minimal FSH stimulation (usually 3 days' stimulation), followed by no human chorionic gonadotrophin (hCG) or minimal hCG priming (single 10,000 IU injection).

oocyte in vitro maturation (IVM) biphasic IVM age

1. Introduction

In vitro maturation (IVM) of oocytes is a technology with a long history. As early as the 1930s, in vitro matured oocytes were utilized in the initial attempts of human in vitro fertilization (IVF) [1][2][3][4]. In 1965, Edwards demonstrated that human oocytes collected from antral follicles could be matured and fertilized in vitro [5][6]. In 1991, Cha and colleagues reported the live birth after IVM of oocytes from non-stimulated cycles followed by IVF, leading to the clinical investigation of IVM [7]. In 2013, it has been estimated that more than 5000 babies derived from IVM have been born around the world [8].

IVM is primarily used in patients with polycystic ovary syndrome (PCOS) or poly-cystic ovaries (PCO) and patients at risk of ovarian hyperstimulation syndrome (OHSS) [9]. For the patients, this technology is cost-effective, safe, and convenient (fewer hormone injections, shorter stimulation cycles, avoidance of OHSS, reduced frequency of monitoring); for the IVM offspring, the initial studies of small sample size showed no significant differences in obstetric, perinatal, and developmental outcomes between IVM and conventional IVF [10][11][12][13][14][15], though large-sample-size long-term follow-up is necessary to comprehensively assess the offspring developmental outcomes. As IVM’s most remarkable advantage is its minimal or even zero ovarian stimulation, it is a good choice for the conditions in which hormone stimulation is contra-indicated or hyper-responsive; it is also a good alternative choice for women who want to donate/preserve oocytes but do not want to suffer side effects from hormone stimulation. With the development of IVM in recent years, the clinical indications for IVM treatment have expanded to (1) fertility preservation (FP) for women at risk of fertility loss and women seeking planned oocyte cryopreservation, (2) women with high/poor response to exogenous gonadotropin treatment, (3) oocyte donation, (4) patients with thrombophilia, and (5) previous failed IVF attempts/recurrent implantation failure [16][17][18][19][20].

However, to date, IVM is not widely applied in clinical practice because of its inferior performance (e.g., low rate of oocyte retrieval and maturation, low rate of blastocyst conversion, and low rate of implantation and pregnancy) compared to conventional IVF [21]. Besides, IVM outcomes among different centers are variable due to a lack of standard and effective protocol for IVM [22]. The definition of IVM also varies among different scholars [5,23–28]. Based on the most recent document from the American Society for Reproductive Medicine (ASRM), the clinical human IVM refers to in vitro maturation of the immature oocytes retrieved from follicles after no follicle stimulating hormone (FSH) or minimal FSH stimulation (usually 3 days’ stimulation), followed by no human chorionic gonadotrophin (hCG) or minimal hCG priming (single 10,000 IU injection) [21].

Knowledge about the influencing factors of oocyte IVM is essential for improving its outcome. In the current review, factors including (1) follicular priming methods and collected eggs, (2) culture conditions, (3) culture methods, (4) time of oocyte retrieval, (5) time of in vitro culture, (6) woman’s age, and (7) cryopreservation and other physical factors were discussed to enable a comprehensive discussion. All these factors may have an impact on the developmental potential of oocytes and/or the synchronization of nuclear and cytoplasmic maturation.

2. Follicular Priming Methods and Collected Eggs

IVM is usually performed in an unstimulated cycle, or a cycle with minimal gonadotropin stimulation to collect immature cumulus-oocyte complexes (COCs). Based on the published reports on clinical IVM, as well as the recent document from ASRM, the follicular priming methods include low doses of FSH stimulation, single hCG injection, and minimal FSH stimulation before single hCG injection [21][23][24][25][26][27][28]. Based on the study of Fadini et al. [24], after single hCG priming or FSH combined with hCG priming, it is possible to collect the already in-vivo-matured oocytes.

FSH is a frequently used gonadotropin for inducing follicle development and ovulation in ART. Generally, in a single FSH-primed IVM cycle, low doses of FSH are used to minimally stimulate ovaries for 3–6 days, followed by oocyte retrieval on days 7–10 without hCG administration. Mild FSH-primed IVM cycles for non-PCOS women with proven fertility [23] and PCOS women with at least one year of infertility [28] have been proven to increase oocyte maturation rate compared to non-stimulated IVM cycles. However, another study revealed that, compared with the unstimulated group, single FSH stimulation in the naturally cycling non-PCOS women did not improve the maturation and fertilization rate of oocytes [25]. Several factors could have contributed to the conflicting results between [23][28] and [25]. Comparing the study by [28] and [29] reveals they were involved in different study populations, and it is possible that single FSH priming may be more suitable for PCOS patients rather than naturally cycling non-PCOS women in regard to IVM, which needs to be validated through further investigation. For the studies by [23] and by [25], even though they focused on similar study populations, the oocytes in [23] were primed with a truncated course of FSH (day two: 300 IU FSH; day four: 150 IU FSH; day six: 150 IU FSH), and the culture medium in [23] was serum-free and not a commercial IVM medium. Therefore, future studies are warranted to clarify the influence of FSH stimulation on IVM outcomes.

The practice of hCG priming in IVM is a highly debated topic and seems to be double-edged. On the one hand, it has been revealed that the use of hCG can enhance angiogenesis of the endometrium [29], promote endometrial receptivity [30] and blastocyst implantation [29], and thus is needed in fresh IVM cycles [30]. A large-scale randomized controlled trial (RCT) involving 400 normo-ovulatory women demonstrated that FSH + hCG priming could significantly increase the IVM rates of oocytes compared to single FSH-priming, hCG-priming, or non-priming [24]. On the other hand, in recent years, scholars have proposed that the definition of IVM [31][32] can include the cycles primed with FSH or its analogues, but should exclude cycles that are intended to trigger oocyte maturation in vivo, such as hCG. Indeed, hCG priming might accelerate the maturation of oocytes in vivo, and make the obtained oocyte population heterogeneous (i.e., being at different stages of maturation). This situation requires a higher frequency of oocyte monitoring. Despite that, some pre-mature oocytes may still undergo an excess in vitro culture time, which makes these oocytes begin aging and pass the optimal fertilization time. Collectively, in the authors’ opinion, if the women undergoing IVM do not require embryo transfer for themselves in a fresh cycle, then hCG priming should be avoided.

3. Culture Conditions

3.1. Culture Medium

The culture medium used in oocyte IVM is the bedrock of the IVM cycle. Different constituents in the IVM medium can influence IVM of the oocyte and subsequent embryo development [33][34]. To date, the reported culture media for IVM in research or clinical applications include several common media and two commercial tailor-made media for IVM. However, no perfect culture medium for IVM has been established yet.

Common media mainly include the tissue culture medium 199 (TCM-199), human tubal fluid (HTF), Ham’s-F10 medium, glucose-free medium (P1), Chang’s medium, and blastocyst medium [35][36][37]. Based on existing literature, TCM-199 is the most commonly used non-tailor-made medium for human oocyte IVM [38][39][40][41][42][43][44][45]. It has also been reported that the performance of TCM-199 in human oocyte IVM is superior to HTF with respect to maturation rate, fertilization rate, and embryo quality [37]. However, another study revealed that the glucose-free P1 medium is superior to TCM-199 (which contains a high glucose concentration) for IVM of human granulosa cell-free oocytes [9]. Commercial tailor-made IVM media mainly include MediCult IVM medium and SAGE IVM medium. These two media have been shown to be equally efficacious [46]. Most previous studies have revealed that the laboratory outcomes in IVM were similar between commercial IVM media (MediCult/SAGE) and other common medium (e.g., TCM-199 medium [47], blastocyst medium [48][49], cleavage medium [51], and homemade IVM medium [49]). There is also a study which revealed that the blastocyst medium enabled a higher IVM rate than the commercial IVM medium [50].

3.2. Protein Sources in Culture Medium

Protein sources are the most common supplement to IVM medium, providing a nitrogen source and acting as an antioxidant, as well as chelator of toxic metal ions [51]. Most media require the addition of a protein source. The exceptions are the commercial SAGE-IVM medium and the LAG medium from MediCult IVM System, which already contain synthetic serum replacements, therefore, no extra protein source is required [46].

During the early development of IVM technology, fetal cord serum (FCS) [7][52], or human follicular fluid (HFF) [7][52], or human peritoneal fluid (HPF) [52] was added to human oocyte IVM medium. Later, patient’s own serum [46], or human serum albumin (HSA) [38][39][40][53][54], or synthetic substitutive serum (SSS) [9][37], or other synthetic serum substitutes [41] were used as a protein source supplement in the maturation medium. Considering the complex mixtures, batch-to-batch variability, and the potential risks of disease/infection transmission with protein supplements from biological sources, HSA and other synthetic serum substitutes are recommended for protein supplementations, as their compositions are relatively pure and well-defined.

Previous study revealed that IVM media supplemented with HSA or HFF resulted in similar developmental competency in immature oocytes [51]. However, another study found that, compared with HSA-supplemented media, patients’ own-serum-supplemented media produced significantly higher maturation rates in oocytes (41% vs. 63%) [55]. This finding indicates that the substances, excluding albumin, presented in maternal serum can influence the maturation of human oocytes. However, studies are needed to develop the ideal protein source that adequately supports human immature oocytes and replaces the maternal serum.

3.3. Hormones in Culture Medium

The oocyte IVM systems are hormone dependent. Hormones, such as recombinant FSH, hCG, luteinizing hormone (LH), insulin, and estradiol (E2), have been added to the IVM medium. However, choosing hormonal supplements and their corresponding concentrations are variable and controversial. FSH is the most basal hormonal supplement in the IVM medium. It can be used as the single hormonal supplement in IVM medium [56][57]. It has been revealed that the addition of FSH supports nuclear maturation but postpones meiotic progression, playing a positive role in oocyte cytoplasmic maturation [58]. In existing literature, the concentration of FSH added to IVM medium ranged from 0.075–0.75 IU/mL, where 0.075 IU/mL was the most widely used concentration. The highest concentration at 0.75 IU/mL did not seem to play any role in enhancing IVM rates [20][29][59][60][61]. In most studies, FSH was usually used in combination with LH [41][53][62][63]/hCG [38][39][42][43][44][64].

Nevertheless, the role of LH and hCG in the IVM medium is controversial. It was previously observed that recombinant hCG (r-hCG) and recombinant LH (r-LH) were equipotent in promoting the IVM of human oocyte [65]. On the contrary, a mouse study reported that the addition of purified urinary hCG (u-hCG), but not r-LH, to IVM medium significantly increased maturation rates of mouse immature oocytes. Compared with u-hCG, r-LH was found more favorable for early embryonic development [66]. Animal mechanism studies indicated that the addition of LH to IVM medium may not be necessary for oocyte IVM [67][68][69], since the levels of LH receptors in cumulus cells (CCs) is very low [70]. In mammalian ovarian follicles, LH promotes and regulates oocyte maturation by acting on the outer granulosa cells, and not the COCs [71].

3.4. Carbohydrates in Culture Medium

Carbohydrates, such as glucose, lactate, and pyruvate, are substrates for generating ATP during oogenesis and have a stimulatory action on the nuclear maturation of oocytes [72]. The oocyte itself has a relatively poor capacity to metabolize glucose, rather, glucose in medium is consumed by CCs, and evidence has shown that CCs are responsible for providing the intermediates of glucose metabolism, such as pyruvate and lactate, which are the preferred energy substrates of the oocyte [73]. While animal studies revealed that, compared with glucose and pyruvate, follicular cells did not particularly rely on lactate for their energy requirements [74], lactate may, however, have additional, non-metabolic roles in the acidification of the local environment [75].

For cumulus cell-enclosed oocytes, media with glucose alone added as an energy source could enable the oocytes to resume meiosis, while for the cumulus cell denuded oocytes, glucose alone does not work, and supplementation of pyruvate in culture media is essential for the resumption of meiosis in denuded oocytes [76]. In a study by Cekleniak et al. [9], though lacking a significant p value, a glucose-free P1 medium (sodium pyruvate: 36.30 mg/L; sodium lactate: 2399.00 mg/L; and glucose: 0 mg/L) brought out higher maturation rates in human cumulus-striped oocytes than a high-glucose TCM-199 medium (sodium pyruvate: 0 mg/L; sodium lactate: 0 mg/L; and glucose: 1000.00 mg/L). This study suggests that, in the absence of CCs, a higher oocyte maturation rate may be achieved in a culture medium with pyruvate and lactate added but without or with little glucose.

4. Two Kinds of Culturing Methods

Currently, there is no uniform culturing method for human oocyte IVM [36][77]. In the conventional IVM, immature oocytes were directly cultured to MII oocytes after oocyte retrieval (Figure 1A). However, conventional IVM focuses on nuclear maturation, ignoring the synchronous maturation of cytoplasm [78]. The cytoplasmic maturation might lag behind nuclear maturation, which may not be easy to recognize. However, for a successful IVM, both nuclear and cytoplasmic maturations are required [79]. To better mimic in vivo meiotic arrest, the biphasic IVM culturing system (also known as capacitation IVM (CAPA-IVM)), which includes a pre-IVM culturing period (around 24 h) before the IVM culturing (Figure 1B), has been well developed in animal IVM [80]. The pre-IVM culturing was mainly applied to inhibit resumption of meiosis and promote synchronization between the nuclear and cytoplasmic maturation. During this period, the culturing medium is usually supplemented with cyclic adenosine monophosphate (cAMP) modulators [81][82], cyclic guanosine monophosphate (cGMP) modulators, 3-isobutyl-1-methyl-xanthine (IBMX) [83], or c-type natriuretic peptide (CNP) [84][85]. Among these, CNP-mediated biphasic IVM culturing systems have been shown to improve the IVM of oocytes in animals (mouse, bovine, and goat) [84][85][86][87][88]. CNP-mediated biphasic IVM is also applied in PCOS patients [89][90][91], and patients with gynecologic malignancies [92]. Compared with conventional IVM, it showed an improved IVM rate [91][92] and clinical pregnancy rate [91], and a reduced oocytes degeneration rate [92]. The introduction of this biphasic IVM in clinical practice [89][90][91][92] has been regarded as the most prominent development over recent years [18].

Figure 1. Conventional and biphasic IVM culture systems. (A) Conventional IVM system, only includes IVM culture phase. (B) Biphasic IVM system, includes a pre-IVM culture phase before IVM culture. The pre-IVM culture inhibits resumption of meiosis in immature oocytes and provides time for acquiring developmental potential. MII, metaphase II.

5. Time of Oocyte Retrieval

The presence and size of a dominant follicle (DF) are currently utilized as the principal measure for timing oocyte retrieval. In females, the follicular diameter is closely associated with the resumption of oocyte meiosis [93][94]. For a normal menstrual cycle, there is generally only one ovulation when the DF reaches around 18–25 mm in diameter. Other sibling follicles undergo atresia. Whereas, for IVM cycles, most centers prefer to schedule oocyte retrieval when the diameter of DF reaches 10–12 mm or when the endometrial thickness reaches at least 5–6 mm for the PCOS patients without leading follicles [21][95][96][97]. DF size exceeding the upper limit can cause detrimental effects on the sibling immature oocytes, resulting in a decreased quality of the retrieved oocytes [21]. However, in clinical practice, there is no consensus on the best timing (in relation to DF size) for oocyte retrieval in IVM cycles. Both the DF ≤ 14 mm [98] and DF ≤ 10 mm [99] have been proposed as the recommended timing for oocyte retrieval. This could be due to the differences in study participants’ type and priming regimens utilized. Prospective RCTs with more detailed subgroups of DF diameter are warranted to classify the most optimal time of oocyte retrieval.

6. Time of In Vitro Culture

Considering different culturing systems, priming regimens, and individuals’ endocrine status, the time of in vitro culture was variable in clinical practice. The IVM culture time of human oocytes is usually set around 24–30 h, which has been shown to achieve IVM rates of 40–60% [56][100]. An increasing culture period may increase the oocyte maturation rate, but it could also lead to poor embryo quality and embryo utilization rate, while a short time culture may result in cytoplasmic immaturity because the cytoplasmic maturation usually lags behind nuclear maturation and is less easily identified [101]. It has been reported that the prolonged in vitro culture time from 24 to 30 h could improve the maturation of rabbit oocyte, especially the ooplasmic maturation [102]. However, the prolonged culture time from 24 to 48 h resulted in aging-like changes in bovine oocytes and significantly lower cleavage rates and blastocyst yields [103]. A 30 h IVM incubation period [104][105] was found to give the best balance between IVM rate and embryological outcome.

7. Woman's Age

Oocyte quality and fertility decline as a woman gets older [106]. Oocytes from aging women exhibited DNA damage [107], meiotic spindle abnormalities, chromosomal misalignment, mitochondrial dysfunction, increased aneuploidy rate [108], and decreased zona pellucida birefringence and thickness [109][110]. A cross-sectional study based on 58 women in an ICSI program also reported that the maturation rates of oocytes were significantly reduced in women over 30 years [110]. Similarly, a study based on 133 patients (aged 1–35 years) who underwent FP by ovarian tissue cryopreservation found that patients between menarche to 25 years could achieve the highest IVM rates, while women ≥ 30 years and pre-menarche girls (< 6 years) obtained extremely low IVM rates (< 10%) [111]. The changed oocyte maturation capacity in different ages may stem from the epigenetic changes [112] and differential gene expressions [113][114] of oocytes as they age. Besides, it has been proven that ovaries before puberty contain abnormal follicles with decreased follicle development [115]. Thus, the prepubertal oocytes usually present truncated maturation rates.

8. Cryopreservation and Other Physical Factors

Though successful birth after cryopreservation of germinal vesicle (GV)-stage oocytes with IVM has been reported in 1998 [116], concerns regarding higher rates of chromosomal abnormalities of immature oocytes after cryopreservation exist [117]. It has been found that vitrification of immature oocytes before IVM can adversely influence oocyte maturation, viability, and subcellular oocyte quality [118]. A meta-analysis based on 14 studies that assessed maturation rate after vitrification of metaphase I (MI)/ GV oocytes concluded that oocyte vitrification decreased the maturation rate by 24% [119]. The vitrification-warming procedure may play a vital role in the decreased developmental potential of oocytes. Meanwhile, it has been shown that vitrification may reduce oocyte competence by increasing dead oocytes and ROS levels [120]. When the ROS level exceeds the physiological limit, the oocyte developmental competence is compromised [121][122], while the rate of apoptosis is increased [123][124].

On the other hand, it has been reported that aspiration under extremely high pressure may strip the CCs surrounding the oocyte, causing adverse effects on oocyte maturation [125]. Currently, the aspiration pressures range between –80 to –120 mm Hg, and needle sizes range between 16 to 20 gauge [23][126]. However, the optimal pressure and needle size have not yet been clearly established. Other physical factors, such as low oxygen tension [127], short-term temperature elevation [128], and micro-vibration [129], were also investigated in animal experiments. Low oxygen tension (5% O2) was found to be beneficial for IVM outcomes [127]. In a previous study, the researchers confirmed that the low oxygen tension contributed to increased levels of tri-methylated-histone-H3-lysine-4 (H3K4me3), indicating active gene transcription [130]. Moreover, short-term temperature elevation (heat stress) can disrupt the developmental competence of the oocytes [128]. Compared with the static system, the micro-vibration culturing system can improve the embryo quality and clinical outcomes of GV-stage oocytes from PCO patients [129].

9. Conclusions

Collectively, the application of a biphasic IVM culturing system, culture medium, and the supplementation have an important influence on IVM outcomes. However, the impact of some factors on IVM remains to be determined, such as different culture medium, different protein sources and hormones in medium, and different follicular priming methods. Their respective roles need to be clarified in more well-designed studies (especially prospective RCTs) in the future. In the long run, IVM can be considered a promising technology, especially as a relevant addition to oncofertility, offering a safer and more physiological alternative to hormone stimulation.


  1. Pincus, G.; Saunders, B. Unfertilized human tubal ova. Anat. Rec. Adv. Integr. Anat. Evol. Biol. 1937, 69, 163–169.
  2. Pincus, G.; Enzmann, E.V. The comparative behavior of mammalian eggs in vivo and in vitro. II. The activation of tubal eggs of the rabbit. J. Exp. Zool. 1936, 73, 195–208.
  3. Rock, J.; Menkin, M.F. In Vitro Fertilization and Cleavage of Human Ovarian Eggs. Science 1944, 100, 105–107.
  4. Menkin, M.F.; Rock, J. In Vitro Fertilization and Cleavage of Human Ovarian Eggs. Am. J. Obstet. Gynecol. 1948, 55, 440–452.
  5. Edwards, R.G. Maturation in vitro of Mouse, Sheep, Cow, Pig, Rhesus Monkey and Human Ovarian Oocytes. Nat. Cell Biol. 1965, 208, 349–351.
  6. Edwards, R. Maturation in vitro of human ovarian oocytes. Lancet 1965, 286, 926–929.
  7. Cha, K.Y.; Koo, J.J.; Ko, J.J.; Choi, D.H.; Han, S.Y.; Yoon, T.K. Pregnancy after in vitro fertilization of human follicular oocytes collected from nonstimulated cycles, their culture in vitro and their transfer in a donor oocyte program. Fertil. Steril. 1991, 55, 109–113.
  8. Chian, R.-C.; Uzelac, P.S.; Nargund, G. In vitro maturation of human immature oocytes for fertility preservation. Fertil. Steril. 2013, 99, 1173–1181.
  9. Cekleniak, N.A.; Combelles, C.M.; Ganz, D.A.; Fung, J.; Albertini, D.F.; Racowsky, C. A novel system for in vitro maturation of human oocytes. Fertil. Steril. 2001, 75, 1185–1193.
  10. Mostinckx, L.; Segers, I.; Belva, F.; Buyl, R.; Santos-Ribeiro, S.; Blockeel, C.; Smitz, J.; Anckaert, E.; Tournaye, H.; De Vos, M. Obstetric and neonatal outcome of ART in patients with polycystic ovary syndrome: IVM of oocytes versus controlled ovarian stimulation. Hum. Reprod. 2019, 34, 1595–1607.
  11. Belva, F.; Roelants, M.; Vermaning, S.; Desmyttere, S.; De Schepper, J.; Bonduelle, M.; Tournaye, H.; Hes, F.; De Vos, M. Growth and other health outcomes of 2-year-old singletons born after IVM versus controlled ovarian stimulation in mothers with polycystic ovary syndrome. Hum. Reprod. Open 2020, 2020, hoz043.
  12. Söderström-Anttila, V.; Salokorpi, T.; Pihlaja, M.; Serenius-Sirve, S.; Suikkari, A.-M. Obstetric and perinatal outcome and preliminary results of development of children born after in vitro maturation of oocytes. Hum. Reprod. 2006, 21, 1508–1513.
  13. Buckett, W.M.; Chian, R.C.; Holzer, H.; Dean, N.; Usher, R.; Tan, S.L. Obstetric Outcomes and Congenital Abnormalities After In Vitro Maturation, In Vitro Fertilization, and Intracytoplasmic Sperm Injection. Obstet. Gynecol. 2007, 110, 885–891.
  14. Roesner, S.; von Wolff, M.; Elsaesser, M.; Roesner, K.; Reuner, G.; Pietz, J.; Bruckner, T.; Strowitzki, T. Two-year development of children conceived by IVM: A prospective controlled single-blinded study. Hum. Reprod. 2017, 32, 1341–1350.
  15. Yu, E.J.; Yoon, T.K.; Lee, W.S.; Park, E.A.; Heo, J.Y.; Ko, Y.K.; Kim, J. Obstetrical, neonatal, and long-term outcomes of children conceived from in vitro matured oocytes. Fertil. Steril. 2019, 112, 691–699.
  16. Li, Y.; Pan, P.; Yuan, P.; Qiu, Q.; Yang, D. Successful live birth in a woman with resistant ovary syndrome following in vitro maturation of oocytes. J. Ovarian Res. 2016, 9, 54.
  17. Fesahat, F.; Kalantar, S.M.; Sheikhha, M.H.; Saeedi, H.; Montazeri, F.; Firouzabadi, R.D.; Khalili, M.A. Developmental and cytogenetic assessments of preimplantation embryos derived from in-vivo or in-vitro matured human oocytes. Eur. J. Med Genet. 2018, 61, 235–241.
  18. De Vos, M.; Grynberg, M.; Ho, T.M.; Yuan, Y.; Albertini, D.F.; Gilchrist, R.B. Perspectives on the development and future of oocyte IVM in clinical practice. J. Assist. Reprod. Genet. 2021, 38, 1265–1280.
  19. Ao, A.; Jin, S.; Rao, D.; Son, W.-Y.; Chian, R.-C.; Tan, S.L. First successful pregnancy outcome after preimplantation genetic diagnosis for aneuploidy screening in embryos generated from natural-cycle in vitro fertilization combined with an in vitro maturation procedure. Fertil. Steril. 2006, 85, 1510.e9–1510.e11.
  20. Walls, M.L.; Hart, R.J. In vitro maturation. Best Pract. Res. Clin. Obstet. Gynaecol. 2018, 53, 60–72.
  21. Practice Committees of the American Society for Reproductive Medicine, the Society of Reproductive Biologists and Technologists, and the Society for Assisted Reproductive Technology. In vitro maturation: A committee opinion. Fertil. Steril. 2021, 115, 298–304.
  22. The Practice Committees of the American Society for Reproductive Medicine and the Society for Assisted Reproductive Technology. In vitro maturation: A committee opinion. Fertil. Steril. 2013, 99, 663–666.
  23. Wynn, P.; Picton, H.M.; Krapez, J.A.; Rutherford, A.J.; Balen, A.H.; Gosden, R.G. Pretreatment with follicle stimulating hor-mone promotes the numbers of human oocytes reaching metaphase II by in-vitro maturation. Hum. Reprod. 1998, 13, 3132–3138.
  24. Fadini, R.; Canto, M.D.; Renzini, M.M.; Brambillasca, F.; Comi, R.; Fumagalli, D.; Lain, M.; Merola, M.; Milani, R.; De Ponti, E. Effect of different gonadotrophin priming on IVM of oocytes from women with normal ovaries: A prospective randomized study. Reprod. Biomed. Online 2009, 19, 343–351.
  25. Mikkelsen, A.L.; Smith, S.D.; Lindenberg, S. In-vitro maturation of human oocytes from regularly menstruating women may be successful without follicle stimulating hormone priming. Hum. Reprod. 1999, 14, 1847–1851.
  26. Chian, R.; Buckett, W.; Tulandi, T.; Tan, S. Prospective randomized study of human chorionic gonadotrophin priming before immature oocyte retrieval from unstimulated women with polycystic ovarian syndrome. Hum. Reprod. 2000, 15, 165–170.
  27. Lin, Y.; Hwang, J.; Huang, L.; Mu, S.; Seow, K.; Chung, J.; Hsieh, B.; Huang, S.; Chen, C.; Chen, P. Combination of FSH priming and hCG priming for in-vitro maturation of human oocytes. Hum. Reprod. 2003, 18, 1632–1636.
  28. Mikkelsen, A.L.; Lindenberg, S. Benefit of FSH priming of women with PCOS to the in vitro maturation procedure and the outcome: A randomized prospective study. Reproduction 2001, 122, 587–592.
  29. Licht, P.; Fluhr, H.; Neuwinger, J.; Wallwiener, D.; Wildt, L. Is human chorionic gonadotropin directly involved in the regu-lation of human implantation? Mol. Cell. Endocrinol. 2007, 269, 85–92.
  30. De Vos, M.; Ortega-Hrepich, C.; Albuz, F.K.; Guzman, L.; Polyzos, N.P.; Smitz, J.; Devroey, P. Clinical outcome of non–hCG-primed oocyte in vitro maturation treatment in patients with polycystic ovaries and polycystic ovary syndrome. Fertil. Steril. 2011, 96, 860–864.e1.
  31. Coticchio, G. IVM in need of clear definitions. Hum. Reprod. 2016, 31, 1387–1389.
  32. De Vos, M.; Smitz, J.; Thompson, J.G.; Gilchrist, R.B. The definition of IVM is clear—Variations need defining. Hum. Reprod. 2016, 31, 2411–2415.
  33. Brackett, B.G.; Zuelke, K.A. Analysis of factors involved in the in vitro production of bovine embryos. Theriogenology 1993, 39, 43–64.
  34. Trounson, A.; Anderiesz, C.; Jones, G. Maturation of human oocytes in vitro and their developmental competence. Reproduction 2001, 121, 51–75.
  35. Kim, M.; Hong, S.J.; Lee, J.H.; Min, C.K.; Hwang, K.J.; Park, R.W. Comparison of in vitro maturation media of immature oocytes: The effectiveness of blastocyst culture media. Fertil. Steril. 2011, 95, 554–557.
  36. Son, W.-Y.; Tan, S.L. Laboratory and embryological aspects of hCG-primed in vitro maturation cycles for patients with poly-cystic ovaries. Hum. Reprod. Update 2010, 16, 675–689.
  37. De Araujo, C.H.M.; Nogueira, D.; De Araujo, M.C.P.M.; Martins, W.D.P.; Ferriani, R.A.; Dos Reis, R.M. Supplemented tissue culture medium 199 is a better medium for in vitro maturation of oocytes from women with polycystic ovary syndrome women than human tubal fluid. Fertil. Steril. 2009, 91, 509–513.
  38. Li, Y.; Liu, H.; Yu, Q.; Liu, H.; Huang, T.; Zhao, S.; Ma, J.; Zhao, H. Growth Hormone Promotes in vitro Maturation of Human Oocytes. Front. Endocrinol. 2019, 10, 485.
  39. Li, Y.; Liu, H.; Wu, K.; Liu, H.; Huang, T.; Chen, Z.-J.; Zhao, S.; Ma, J.; Zhao, H. Melatonin promotes human oocyte maturation and early embryo development by enhancing clathrin-mediated endocytosis. J. Pineal Res. 2019, 67, e12601.
  40. Goud, P.T.; Goud, A.P.; Qian, C.; Laverge, H.; Van Der Elst, J.; De Sutter, P.; Dhont, M. In-vitro maturation of human germinal vesicle stage oocytes: Role of cumulus cells and epidermal growth factor in the culture medium. Hum. Reprod. 1998, 13, 1638–1644.
  41. Anderson, R.A.; Bayne, R.A.; Gardner, J.; De Sousa, P.A. Brain-derived neurotrophic factor is a regulator of human oocyte maturation and early embryo development. Fertil. Steril. 2010, 93, 1394–1406.
  42. Hao, Y.; Zhang, Z.; Han, D.; Cao, Y.; Zhou, P.; Wei, Z.; Lv, M.; Chen, D. Gene expression profiling of human blastocysts from in vivo and ‘rescue IVM’ with or without melatonin treatment. Mol. Med. Rep. 2017, 16, 1278–1288.
  43. Cao, Y.; Zhao, H.; Wang, Z.; Zhang, C.; Bian, Y.; Liu, X.; Zhang, C.; Zhang, X.; Zhao, Y. Quercetin promotes in vitro maturation of oocytes from humans and aged mice. Cell Death Dis. 2020, 11, 1–15.
  44. Liu, M.-J.; Sun, A.-G.; Zhao, S.-G.; Liu, H.; Ma, S.-Y.; Li, M.; Huai, Y.-X.; Zhao, H.; Liu, H. Resveratrol improves in vitro maturation of oocytes in aged mice and humans. Fertil. Steril. 2018, 109, 900–907.
  45. Wang, Q.; Tang, S.-B.; Song, X.-B.; Deng, T.-F.; Zhang, T.-T.; Yin, S.; Luo, S.-M.; Shen, W.; Zhang, C.-L.; Ge, Z.-J. High-glucose concentrations change DNA methylation levels in human IVM oocytes. Hum. Reprod. 2018, 33, 474–481.
  46. Vutyavanich, P.P.T. Comparison of Medicult and Sage Media for In Vitro Maturation of Immature Oocytes Obtained during Cesarean Deliveries. J. Fertil. Vitr. IVF-Worldwide Reprod. Med. Genet. Stem Cell Biol. 2014, 3, 1000136.
  47. Filali, M.; Hesters, L.; Fanchin, R.; Tachdjian, G.; Frydman, R.; Frydman, N. Retrospective comparison of two media for invitro maturation of oocytes. Reprod. Biomed. Online 2008, 16, 250–256.
  48. Pongsuthirak, P.; Songveeratham, S.; Vutyavanich, T. Comparison of Blastocyst and Sage Media for In Vitro Maturation of Human Immature Oocytes. Reprod. Sci. 2014, 22, 343–346.
  49. Fesahat, F.; Faramarzi, A.; Sheikhha, M.H.; Firouzabadi, R.D.; Khalili, M.A. Comparing the effects of different in vitro matu-ration media on IVM outcomes of MI oocytes. Middle East Fertil. Soc. J. 2017, 22, 174–177.
  50. Fesahat, F.; Firouzabadi, R.D.; Faramarzi, A.; Khalili, M.A. The effects of different types of media on in vitro maturation out-comes of human germinal vesicle oocytes retrieved in intracytoplasmic sperm injection cycles. Clin. Exp. Reprod. Med. 2017, 44, 79–84.
  51. Jee, B.C.; Han, S.H.; Moon, J.H.; Suh, C.S.; Kim, S.H. Influence of well defined protein source on in vitro maturation of human oocyte: Human follicular fluid versus human serum albumin. Fertil. Steril. 2008, 89, 348–352.
  52. Cha, K.; Do, B.; Chi, H.; Yoon, T.; Choi, D.; Koo, J.; Ko, J. Viability of Human Follicular Oocytes Collected from Unstimulated Ovaries and Matured and Fertilized in vitro. Reprod. Fertil. Dev. 1992, 4, 695–701.
  53. Chatroudi, M.H.; Khalili, M.A.; Ashourzadeh, S.; Anbari, F.; Shahedi, A.; Safari, S. Growth differentiation factor 9 and cumulus cell supplementation in in vitro maturation culture media enhances the viability of human blastocysts. Clin. Exp. Reprod. Med. 2019, 46, 166–172.
  54. Ben-Ami, I.; Komsky, A.; Bern, O.; Kasterstein, E.; Komarovsky, D.; Ron-El, R. In vitro maturation of human germinal vesicle-stage oocytes: Role of epidermal growth factor-like growth factors in the culture medium. Hum. Reprod. 2011, 26, 76–81.
  55. Mikkelsen, A.; Høst, E.; Blaabjerg, J.; Lindenberg, S. Maternal serum supplementation in culture medium benefits maturation of immature human oocytes. Reprod. Biomed. Online 2001, 3, 112–116.
  56. Ge, H.-S.; Huang, X.-F.; Zhang, W.; Zhao, J.-Z.; Lin, J.-J.; Zhou, W. Exposure to human chorionic gonadotropin during in vitro maturation does not improve the maturation rate and developmental potential of immature oocytes from patients with poly-cystic ovary syndrome. Fertil. Steril. 2008, 89, 98–103.
  57. Zhao, P.; Qiao, J.; Huang, S.; Zhang, Y.; Liu, S.; Yan, L.-Y.; Hsueh, A.J.; Duan, E.-K. Gonadotrophin-induced paracrine regu-lation of human oocyte maturation by BDNF and GDNF secreted by granulosa cells. Hum. Reprod. 2011, 26, 695–702.
  58. Ye, J.; Campbell, K.; Craigon, J.; Luck, M. Dynamic Changes in Meiotic Progression and Improvement of Developmental Competence of Pig Oocytes in Vitro by Follicle-Stimulating Hormone and Cycloheximide1. Biol. Reprod. 2005, 72, 399–406.
  59. Mikkelsen, A.; Smith, S.; Lindenberg, S. Impact of oestradiol and inhibin A concentrations on pregnancy rate in in-vitro oocyte maturation. Hum. Reprod. 2000, 15, 1685–1690.
  60. Junk, S.M.; Yeap, D. Improved implantation and ongoing pregnancy rates after single-embryo transfer with an optimized protocol for in vitro oocyte maturation in women with polycystic ovaries and polycystic ovary syndrome. Fertil. Steril. 2012, 98, 888–892.
  61. Le Du, A.; Kadoch, I.; Bourcigaux, N.; Doumerc, S.; Bourrier, M.-C.; Chevalier, N.; Fanchin, R.; Chian, R.-C.; Tachdjian, G.; Frydman, N.A. In vitro oocyte maturation for the treatment of infertility associated with polycystic ovarian syndrome: The French experience. Hum. Reprod. 2005, 20, 420–424.
  62. Yu, Y.; Yan, J.; Li, M.; Yan, L.; Zhao, Y.; Lian, Y.; Li, R.; Liu, P.; Qiao, J. Effects of combined epidermal growth factor, brain-derived neurotrophic factor and insulin-like growth factor-1 on human oocyte maturation and early fertilized and cloned embryo development. Hum. Reprod. 2012, 27, 2146–2159.
  63. Ashourzadeh, S.; Khalili, M.A.; Omidi, M.; A Nottola, S.; Faramarzi, A. Supplementation of IVM culture media with GDF-9 enhanced oocyte quality, fertilization and embyo development in ICSI program. Cent. Asian J. Med Pharm. Sci. Innov. 2021, 1, 44–54.
  64. Virant-Klun, I.; Bauer, C.; Ståhlberg, A.; Kubista, M.; Skutella, T. Human oocyte maturation in vitro is improved by co-culture with cumulus cells from mature oocytes. Reprod. Biomed. Online 2018, 36, 508–523.
  65. Hreinsson, J.; Rosenlund, B.; Fridén, B.; Levkov, L.; Ek, I.; Suikkari, A.-M.; Hovatta, O.; Fridström, M. Recombinant LH is equally effective as recombinant hCG in promoting oocyte maturation in a clinical in-vitro maturation programme: A randomized study. Hum. Reprod. 2003, 18, 2131–2136.
  66. Dinopoulou, V.; Drakakis, P.; Kefala, S.; Kiapekou, E.; Bletsa, R.; Anagnostou, E.; Kallianidis, K.; Loutradis, D. Effect of re-combinant-LH and hCG in the absence of FSH on in vitro maturation (IVM) fertilization and early embryonic development of mouse germinal vesicle (GV)-stage oocytes. Reprod. Biol. 2016, 16, 138–146.
  67. Downs, S.M. Regulation of the G2/M transition in rodent oocytes. Mol. Reprod. Dev. 2010, 77, 566–585.
  68. Albertini, D.F.; Sanfins, A.; Combelles, C.M. Origins and manifestations of oocyte maturation competencies. Reprod. Biomed. Online 2003, 6, 410–415.
  69. Gilchrist, R.B. Recent insights into oocyte—Follicle cell interactions provide opportunities for the development of new ap-proaches to in vitro maturation. Reprod. Fertil. Dev. 2011, 23, 23–31.
  70. Maman, E.; Yung, Y.; Kedem, A.; Yerushalmi, G.M.; Konopnicki, S.; Cohen, B.; Dor, J.; Hourvitz, A. High expression of lute-inizing hormone receptors messenger RNA by human cumulus granulosa cells is in correlation with decreased fertilization. Fertil. Steril. 2012, 97, 592–598.
  71. Jaffe, L.A.; Norris, R.P. Initiation of the Meiotic Prophase-to-Metaphase Transition in Mammalian Oocytes. In Oogenesis; Wiley: Hoboken, NJ, USA, 2010; pp. 179–197.
  72. Lim, J.M.; Lee, B.C.; Lee, E.S.; Chung, H.M.; Ko, J.J.; Park, S.E.; Cha, K.Y.; Hwang, W.S. In vitro maturation and in vitro fertilization of bovine oocytes cultured in a chemically defined, protein-free medium: Effects of carbohydrates and amino acids. Reprod. Fertil. Dev. 1999, 11, 127–132.
  73. Cetica, P.; Pintos, L.; Dalvit, G.; Beconi, M. Effect of lactate dehydrogenase activity and isoenzyme localization in bovine oocytes and utilization of oxidative substrates on in vitro maturation. Theriogenology 1999, 51, 541–550.
  74. Nandi, S.; Kumar, V.G.; Manjunatha, B.; Ramesh, H.; Gupta, P. Follicular fluid concentrations of glucose, lactate and pyruvate in buffalo and sheep, and their effects on cultured oocytes, granulosa and cumulus cells. Theriogenology 2008, 69, 186–196.
  75. Leese, H.; Lenton, E. Glucose and lactate in human follicular fluid: Concentrations and interrelationships. Hum. Reprod. 1990, 5, 915–919.
  76. Eppig, J.J.; Pendola, F.L.; Wigglesworth, K.; Pendola, J.K. Mouse Oocytes Regulate Metabolic Cooperativity Between Granulosa Cells and Oocytes: Amino Acid Transport. Biol. Reprod. 2005, 73, 351–357.
  77. Leon, P.; Campos, V.; Kaefer, C.; Begnini, K.; McBride, A.; Dellagostin, O.; Seixas, F.; Deschamps, J.; Collares, T. Expression of apoptotic genes in immature and in vitro matured equine oocytes and cumulus cells. Zygote 2013, 21, 279–285.
  78. Coticchio, G.; Canto, M.D.; Renzini, M.M.; Guglielmo, M.C.; Brambillasca, F.; Turchi, D.; Novara, P.V.; Fadini, R. Oocyte maturation: Gamete-somatic cells interactions, meiotic resumption, cytoskeletal dynamics and cytoplasmic reorganization. Hum. Reprod. Update 2015, 21, 427–454.
  79. Brown, H.M.; Dunning, K.R.; Sutton-McDowall, M.; Gilchrist, R.B.; Thompson, J.G.; Russell, D.L.; Gilchrist, R.B. Failure to launch: Aberrant cumulus gene expression during oocyte in vitro maturation. Reproduction 2017, 153, R109–R120.
  80. Gilchrist, R.B.; Luciano, A.M.; Richani, D.; Zeng, H.T.; Wang, X.; De Vos, M.; Sugimura, S.; Smitz, J.; Richard, F.J.; Thompson, J.G. Oocyte maturation and quality: Role of cyclic nucleotides. Reproduction 2016, 152, R143–R157.
  81. Funahashi, H.; Cantley, T.C.; Day, B.N. Synchronization of Meiosis in Porcine Oocytes by Exposure to Dibutyryl Cyclic Adenosine Monophosphate Improves Developmental Competence Following in Vitro Fertilization1. Biol. Reprod. 1997, 57, 49–53.
  82. Luciano, A.M.; Pocar, P.; Milanesi, E.; Modina, S.; Rieger, D.; Lauria, A.; Gandolfi, F. Effect of different levels of intracellular cAMP on the in vitro maturation of cattle oocytes and their subsequent development following in vitro fertilization. Mol. Reprod. Dev. 1999, 54, 86–91.
  83. Huang, W.; Nagano, M.; Kang, S.-S.; Yanagawa, Y.; Takahashi, Y. Effects of in vitro growth culture duration and prematuration culture on maturational and developmental competences of bovine oocytes derived from early antral follicles. Theriogenology 2013, 80, 793–799.
  84. Franciosi, F.; Coticchio, G.; Lodde, V.; Tessaro, I.; Modina, S.; Fadini, R.; Canto, M.D.; Renzini, M.M.; Albertini, D.F.; Luciano, A.M. Natriuretic Peptide Precursor C Delays Meiotic Resumption and Sustains Gap Junction-Mediated Communication in Bovine Cumulus-Enclosed Oocytes1. Biol. Reprod. 2014, 91, 61.
  85. Romero, S.; Sánchez, F.; Lolicato, F.; Van Ranst, H.; Smitz, J. Immature Oocytes from Unprimed Juvenile Mice Become a Valuable Source for Embryo Production When Using C-Type Natriuretic Peptide as Essential Component of Culture Medium. Biol. Reprod. 2016, 95, 64.
  86. Zhao, Y.; Liao, X.; Krysta, A.; Bertoldo, M.; Richani, D.; Gilchrist, R. Capacitation IVM improves cumulus function and oocyte quality in minimally stimulated mice. J. Assist. Reprod. Genet. 2020, 37, 77–88.
  87. Zhang, J.; Wei, Q.; Cai, J.; Zhao, X.; Ma, B. Effect of C-Type Natriuretic Peptide on Maturation and Developmental Competence of Goat Oocytes Matured In Vitro. PLoS ONE 2015, 10, e0132318.
  88. Zhang, T.; Zhang, C.; Fan, X.; Li, R.; Zhang, J. Effect of C-type natriuretic peptide pretreatment on in vitro bovine oocyte maturation. Vitr. Cell. Dev. Biol. Anim. 2017, 53, 199–206.
  89. Sánchez, F.; Lolicato, F.; Romero, S.; De Vos, M.; Van Ranst, H.; Verheyen, G.; Anckaert, E.; Smitz, J. An improved IVM method for cumulus-oocyte complexes from small follicles in polycystic ovary syndrome patients enhances oocyte competence and embryo yield. Hum. Reprod. 2017, 32, 2056–2068.
  90. Sánchez, F.; Le, A.H.; Ho, V.N.A.; Romero, S.; Van Ranst, H.; De Vos, M.; Gilchrist, R.B.; Ho, T.M.; Vuong, L.N.; Smitz, J. Biphasic in vitro maturation (CAPA-IVM) specifically improves the developmental capacity of oocytes from small antral follicles. J. Assist. Reprod. Genet. 2019, 36, 2135–2144.
  91. Vuong, L.N.; Le, A.H.; Ho, V.N.A.; Pham, T.D.; Sánchez, F.; Romero, S.; De Vos, M.; Ho, T.M.; Gilchrist, R.B.; Smitz, J. Live births after oocyte in vitro maturation with a prematuration step in women with polycystic ovary syndrome. J. Assist. Reprod. Genet. 2020, 37, 347–357.
  92. Kirillova, A.; Bunyaeva, E.; Van Ranst, H.; Khabas, G.; Farmakovskaya, M.; Kamaletdinov, N.; Nazarenko, T.; Abubakirov, A.; Sukhikh, G.; Smitz, J.E.J. Improved maturation competence of ovarian tissue oocytes using a biphasic in vitro maturation system for patients with gynecological malignancy: A study on sibling oocytes. J. Assist. Reprod. Genet. 2021, 38, 1331–1340.
  93. Cavilla, J.; Byskov, A.; Hartshorne, G.; Kennedy, C. Human immature oocytes grow during culture for IVM. Hum. Reprod. 2007, 23, 37–45.
  94. Sánchez, F.; Romero, S.; De Vos, M.; Verheyen, G.; Smitz, J. Human cumulus-enclosed germinal vesicle oocytes from early antral follicles reveal heterogeneous cellular and molecular features associated with in vitro maturation capacity. Hum. Reprod. 2015, 30, 1396–1409.
  95. Romero, S.; Pella, R.; Escudero, F.; Pérez, Y.; García, M.; Orihuela, P. Occurrence of ovarian follicular dominance during stimulation for IVM impacts usable blastocyst yield. JBRA Assist. Reprod. 2018, 22, 56–60.
  96. Shalom-Paz, E.; Holzer, H.E.G.; Son, W.-Y.; Levin, I.; Tan, S.L.; Almog, B. PCOS patients can benefit from in vitro maturation (IVM) of oocytes. Eur. J. Obstet. Gynecol. Reprod. Biol. 2012, 165, 53–56.
  97. Hatırnaz, Ş.; Ata, B.; Hatırnaz, E.S.; Dahan, M.; Tannus, S.; Tan, J.; Tan, S.L. Oocyte in vitro maturation: A sytematic review. J. Turk. Soc. Obstet. Gynecol. 2018, 15, 112–125.
  98. Son, W.-Y.; Chung, J.-T.; Herrero, B.; Dean, N.; Demirtas, E.; Holzer, H.E.G.; Elizur, S.; Chian, R.-C.; Tan, S.L. Selection of the optimal day for oocyte retrieval based on the diameter of the dominant follicle in hCG-primed in vitro maturation cycles. Hum. Reprod. 2008, 23, 2680–2685.
  99. Cobo, A.C.; Requena, A.; Neuspiller, F.; Aragonés, M.; Mercader, A.; Navarro, J.; Simón, C.; Remohí, J.; Pellicer, A. Maturation in vitro of human oocytes from unstimulated cycles: Selection of the optimal day for ovum retrieval based on follicular size. Hum. Reprod. 1999, 14, 1864–1868.
  100. Son, W.-Y.; Yoon, S.-H.; Lim, J.-H. Effect of gonadotrophin priming on in-vitro maturation of oocytes collected from women at risk of OHSS. Reprod. Biomed. Online 2006, 13, 340–348.
  101. Lu, C.; Zhang, Y.; Zheng, X.; Song, X.; Yang, R.; Yan, J.; Feng, H.; Qiao, J. Current perspectives on in vitro maturation and its effects on oocyte genetic and epigenetic profiles. Sci. China Life Sci. 2018, 61, 633–643.
  102. Tao, Y.; Cao, C.; Zhang, M.; Fang, F.; Liu, Y.; Zhang, Y.; Ding, J.; Zhang, X. Effects of cumulus cells on rabbit oocyte in vitro-maturation. J. Anim. Physiol. Anim. Nutr. 2008, 92, 438–447.
  103. Heinzmann, J.; Mattern, F.; Aldag, P.; Bernal-Ulloa, S.M.; Schneider, T.; Haaf, T.; Niemann, H. Extended in vitro maturation affects gene expression and DNA methylation in bovine oocytes. Mol. Hum. Reprod. 2015, 21, 770–782.
  104. Segers, I.; Mateizel, I.; Van Moer, E.; Smitz, J.; Tournaye, H.; Verheyen, G.; De Vos, M. In vitro maturation (IVM) of oocytes recovered from ovariectomy specimens in the laboratory: A promising “ex vivo” method of oocyte cryopreservation resulting in the first report of an ongoing pregnancy in Europe. J. Assist. Reprod. Genet. 2015, 32, 1221–1231.
  105. Combelles, C.; Cekleniak, N.; Racowsky, C.; Albertini, D. Assessment of nuclear and cytoplasmic maturation in in-vitro matured human oocytes. Hum. Reprod. 2002, 17, 1006–1016.
  106. Navot, D.; Bergh, R.; Williams, M.; Garrisi, G.; Guzman, I.; Sandler, B.; Grunfeld, L. Poor oocyte quality rather than implan-tation failure as a cause of age-related decline in female fertility. Lancet 1991, 337, 1375–1377.
  107. Marangos, P.; Stevense, M.; Niaka, K.; Lagoudaki, M.; Nabti, I.; Jessberger, R.; Carroll, J. DNA damage-induced metaphase I arrest is mediated by the spindle assembly checkpoint and maternal age. Nat. Commun. 2015, 6, 8706.
  108. Selesniemi, K.; Lee, H.-J.; Muhlhauser, A.; Tilly, J.L. Prevention of maternal aging-associated oocyte aneuploidy and meiotic spindle defects in mice by dietary and genetic strategies. Proc. Natl. Acad. Sci. USA 2011, 108, 12319–12324.
  109. Valeri, C.; Pappalardo, S.; De Felici, M.; Manna, C. Correlation of oocyte morphometry parameters with woman’s age. J. Assist. Reprod. Genet. 2011, 28, 545–552.
  110. Omidi, M.; Khalili, M.A.; Nahangi, H.; Ashourzadeh, S.; Rahimipour, M. Does women’s age influence zona pellucida bire-fringence of metaphase II oocytes in in-vitro maturation program? Int. J. Reprod. Biomed. 2013, 11, 823–828.
  111. Karavani, G.; Wasserzug-Pash, P.; Mordechai-Daniel, T.; Bauman, D.; Klutstein, M.; Imbar, T. Age-Dependent in vitro Maturation Efficacy of Human Oocytes—Is There an Optimal Age? Front. Cell Dev. Biol. 2021, 9, 1638.
  112. Wasserzug-Pash, P.; Klutstein, M. Epigenetic changes in mammalian gametes throughout their lifetime: The four seasons metaphor. Chromosoma 2019, 128, 423–441.
  113. Reyes, J.M.; Silva, E.; Chitwood, J.L.; Schoolcraft, W.B.; Krisher, R.L.; Ross, P.J. Differing molecular response of young and advanced maternal age human oocytes to IVM. Hum. Reprod. 2017, 32, 2199–2208.
  114. Llonch, S.; Barragán, M.; Nieto, P.; Mallol, A.; Elosua-Bayes, M.; Lorden, P.; Ruiz, S.; Zambelli, F.; Heyn, H.; Vassena, R.; et al. Single human oocyte transcriptome analysis reveals distinct maturation stage-dependent pathways impacted by age. Aging Cell 2021, 20, e13360.
  115. Anderson, R.A.; McLaughlin, M.; Wallace, W.H.B.; Albertini, D.F.; Telfer, E. The immature human ovary shows loss of abnormal follicles and increasing follicle developmental competence through childhood and adolescence. Hum. Reprod. 2014, 29, 97–106.
  116. Tucker, M.J.; Wright, G.; Morton, P.C.; Massey, J.B. Birth after cryopreservation of immature oocytes with subsequent in vitro maturation. Fertil. Steril. 1998, 70, 578–579.
  117. Park, S.-E.; Son, W.-Y.; Lee, S.-H.; Lee, K.-A.; Ko, J.-J.; Cha, K.-Y. Chromosome and spindle configurations of human oocytes matured in vitro after cryopreservation at the germinal vesicle stage. Fertil. Steril. 1997, 68, 920–926.
  118. Mohsenzadeh, M.; Tabibnejad, N.; Vatanparast, M.; Anbari, F.; Khalili, M.A.; Karimi-Zarchi, M. Vitrification has detrimental effects on maturation, viability, and subcellular quality of oocytes post IVM in cancerous women: An experimental study. Int. J. Reprod. Biomed. 2019, 17, 167–176.
  119. Mohsenzadeh, M.; Salehi-Abargouei, A.; Tabibnejad, N.; Karimi-Zarchi, M.; Khalili, M.A. Effect of vitrification on human oocyte maturation rate during in vitro maturation procedure: A systematic review and meta-analysis. Cryobiology 2018, 83, 84–89.
  120. Menéndez-Blanco, I.; Soto-Heras, S.; Catalá, M.G.; Piras, A.-R.; Izquierdo, D.; Paramio, M.-T. Effect of vitrification of in vitro matured prepubertal goat oocytes on embryo development after parthenogenic activation and intracytoplasmic sperm injection. Cryobiology 2020, 93, 56–61.
  121. Yang, H.; Kuhn, C.; Kolben, T.; Ma, Z.; Lin, P.; Mahner, S.; Jeschke, U.; Von Schönfeldt, V. Early Life Oxidative Stress and Long-Lasting Cardiovascular Effects on Offspring Conceived by Assisted Reproductive Technologies: A Review. Int. J. Mol. Sci. 2020, 21, 5175.
  122. Khazaei, M.; Aghaz, F. Reactive Oxygen Species Generation and Use of Antioxidants during In Vitro Maturation of Oocytes. Int. J. Fertil. Steril. 2017, 11, 63–70.
  123. Tatemoto, H.; Sakurai, N.; Muto, N. Protection of Porcine Oocytes Against Apoptotic Cell Death Caused by Oxidative Stress During In Vitro Maturation: Role of Cumulus Cells. Biol. Reprod. 2000, 63, 805–810.
  124. Zhao, X.-M.; Hao, H.-S.; Du, W.-H.; Zhao, S.-J.; Wang, H.-Y.; Wang, N.; Wang, D.; Liu, Y.; Qin, T.; Zhu, H.-B. Melatonin inhibits apoptosis and improves the developmental potential of vitrified bovine oocytes. J. Pineal Res. 2016, 60, 132–141.
  125. Hashimoto, S.; Fukuda, A.; Murata, Y.; Kikkawa, M.; Oku, H.; Kanaya, H.; Sonoda, M.; Sugihara, K.; Murata, T.; Nagata, F.; et al. Effect of aspiration vacuum on the developmental competence of immature human oocytes retrieved using a 20-gauge needle. Reprod. Biomed. Online 2007, 14, 444–449.
  126. Yoon, H.-G.; Yoon, S.-H.; Son, W.-Y.; Lee, S.-W.; Park, S.-P.; Im, K.-S.; Lim, J.-H. Clinical Assisted Reproduction: Pregnancies Resulting from In Vitro Matured Oocytes Collected from Women with Regular Menstrual Cycle. J. Assist. Reprod. Genet. 2001, 18, 325–329.
  127. Hashimoto, S.; Minami, N.; Takakura, R.; Yamada, M.; Imai, H.; Kashima, N. Low oxygen tension during in vitro maturation is beneficial for supporting the subsequent development of bovine cumulus-oocyte complexes. Mol. Reprod. Dev. 2000, 57, 353–360.
  128. Stamperna, K.; Giannoulis, T.; Nanas, I.; Kalemkeridou, M.; Dadouli, K.; Moutou, K.; Amiridis, G.S.; Dovolou, E. Short term temperature elevation during IVM affects embryo yield and alters gene expression pattern in oocytes, cumulus cells and blas-tocysts in cattle. Theriogenology 2020, 156, 36–45.
  129. Yang, S.-H.; Yoon, S.-H.; Jung, J.-H.; Lim, J.-H.; Ko, Y. Improvement of embryonic development and clinical outcomes of germinal vesicle stage oocytes using a microvibration culture system. Syst. Biol. Reprod. Med. 2019, 65, 333–341.
  130. Yang, H.; Ma, Z.; Peng, L.; Kuhn, C.; Rahmeh, M.; Mahner, S.; Jeschke, U.; von Schönfeldt, V. Comparison of Histone H3K4me3 between IVF and ICSI Technologies and between Boy and Girl Offspring. Int. J. Mol. Sci. 2021, 22, 8574.
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