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Updated: Jun 19, 2026

Human Blastocyst Biopsy and Vitrification
Published on: July 26, 2019
Outcomes of day-1, day-3, and blastocyst cryopreserved embryo transfers
Vasiliki A Moragianni1, Jerry D Cohen, Scott E Smith
1Department of Obstetrics and Gynecology, Abington Memorial Hospital, Abington, Pennsylvania 19001, USA.
Abstract:
The optimal developmental stage for cryopreserving embryos in IVF-ET remains controversial. Our study demonstrates that besides an improvement in postthaw survival rate for day-1 and blastocyst cryopreserved ET over day-3, all three groups attained statistically similar implantation, clinical pregnancy, multiple, twinning, and male gender rates.
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