A Comparative Analysis of Pregnancy Success Rates between Day 3 and Day 4 for Frozen Human Embryos
DOI:
https://doi.org/10.48047/3vwr4p05Keywords:
frozen embryos transfer, cryopreservation, thawing, pregnancy rate, transfer day 3, transfer day 4.Abstract
Objective: This study aimed to assess the pregnancy success rates following frozen embryo transfers conducted on either day 3 or 4. Embryos cryopreserved on day 3 underwent immediate transfer or were cultured for an additional day before transfer on day 4.
Methods: Retrospectively, the study examined outcomes from 186 frozen embryo transfers. Of these, 93 embryos were thawed and transferred on day 3, while the remaining 93 were thawed on day 3, cultured overnight, and then transferred on day 4.
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References
- Vander Borght, Mélodie, and Christine Wyns. "Fertility and infertility: Definition and epidemiology." Clinical biochemistry 62 (2018): 2-10.
- Basirat Z, Kashifard M, Amiri MG. Enhanced ovarian folliclular development by metformin does not correlate with pregnancy rate: a randomized trial. Int J Fertil Steril. 2012;6:31–36. [PMC free article] [PubMed] [Google Scholar]
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