Announcements
Clinical and Experimental Obstetrics & Gynecology (CEOG) is published by IMR Press from Volume 47 Issue 1 (2020). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with S.O.G.
Original Research
Length of time of embryo storage does not negatively influence pregnancy rates after thawing and transfer
Show Less
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. 2010, 37(3), 185–186;
Published: 10 September 2010
Abstract
Purpose: To determine if longer storage of embryos in a cryopreserved state negatively affects the chance of successful implantation following thawing and transfer. Methods: A retrospective cohort analysis of frozen-thawed embryos that had been donated to recipients. Four time periods were evaluated. Results: No significant decrease in pregnancy or implantation rates was found in the longest freezing group ( ≥6 years). In fact, if there was a trend, it was for improved pregnancy rates with longer storage. One of the successes was from embryos stored about 12 years. Conclusions: Hopefully these data and results from other IVF centers will influence those countries having a mandatory discarding policy to reconsider and lift these restrictions, especially to increase the pool of embryos available for donation.
Keywords
Cryopreservation
Donated embryos
Length of freezing