IMR Press / CEOG / Volume 36 / Issue 4 / pii/1630635892480-139868061

Clinical and Experimental Obstetrics & Gynecology (CEOG) is published by IMR Press from Volume 46 Issue 1 (2019). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with S.O.G.

Open Access Original Research
Effect of the degree of fragmentation on embryo survival after freeze-thawing
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1 The University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School at Camden, Cooper Hospital/University Medical Center, Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology & Infertility, Camden, NJ (USA)
Clin. Exp. Obstet. Gynecol. 2009, 36(4), 216–216;
Published: 10 December 2009

Purpose: To determine if the degree of fragmentation of embryos prior to freezing correlate in a negative manner with survival after thawing. Methods: A retrospective review of frozen embryos thawed for purposes of embryo transfer was done. Survival and transferability rates were determined according to degree of fragmentation. Results: The chance that an embryo with <25% fragmentation was deemed good enough for transfer upon thawing was 63.6% compared to 52.8% for embryos >25% (p < .05). Conclusions: Though more fragmented embryos have a lower survival rate after freeze thawing, about 50% of embryos with >25% fragmentation will still survive the thaw and be able to be transferred.
Embryo freezing
Survival rate
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