Effect of vitrification on human oocyte maturation rate during in vitro maturation procedure: A systematic review and meta-analysis

Combination of in vitro maturation (IVM) and cryopreservation offers new opportunities for women with contraindication in ovarian stimulation, and females who desire to postpone the childbearing due to different problems. There are still controversies regarding IVM procedure and its impact on oocyte...

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Bibliographic Details
Published in:Cryobiology 2018-08, Vol.83, p.84-89
Main Authors: Mohsenzadeh, Mehdi, Salehi-Abargouei, Amin, Tabibnejad, Nasim, Karimi-Zarchi, Mojgan, Khalili, Mohammad Ali
Format: Article
Language:English
Subjects:
CRD42017054372
Cryopreservation
Cryopreservation - methods
Female
Freezing
Human oocyte
Humans
In vitro maturation
In Vitro Oocyte Maturation Techniques - methods
Maturation rate
Oocytes - growth & development
Oogenesis - physiology
Vitrification
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Summary:Combination of in vitro maturation (IVM) and cryopreservation offers new opportunities for women with contraindication in ovarian stimulation, and females who desire to postpone the childbearing due to different problems. There are still controversies regarding IVM procedure and its impact on oocytes fertilization capability. This systematic review and meta-analysis were conducted to evaluate the impact of vitrification on human oocyte maturation rate during IVM procedure. In this review, we searched Medline, Embase, Scopus and ISI web of science to identify English-language studies. The last search was implemented on 3 February 2018. The original articles which assessed maturation rate after vitrification of MI or GV oocytes were included. Animal trials and the studies that performed cryopreservation using slow-freeze method were excluded. Bias and quality assessments were performed. 2476 articles were screened primarily. After duplication removing and the application of inclusion and exclusion criteria, 14 studies included for the analysis. All studies compared maturation rate between the oocytes that were vitrified at the GV or MI stage before maturation and oocytes which were matured in vitro without vitrification. Meta-analysis showed that oocyte vitrification at GV stage had a significant negative impact on maturation rate (RR = 0.76, 95% CI: 0.66–0.88); I2 = 85.2%; P = 0.000). Finally, based on our results, oocyte vitrification decreases the maturation rate by 24%.
ISSN:0011-2240
1090-2392
DOI:10.1016/j.cryobiol.2018.05.003