Cryopreserved blastocysts have a lower implantation but an equal live birth rate as compared to fresh blastocysts of the same quality - a case-control study.

Abstract:

:The purpose of this case-control study was to compare implantation, pregnancy, and live birth rate of cryopreserved embryos with that of fresh embryos. A total of 1,488 assisted reproductive technology (ART) trials including 188 cryopreserved embryo replacement trials were reviewed. After proofing the exclusion criteria, 112 patients undergoing a cryopreserved embryo replacement (study group) were matched with 112 patients undergoing a fresh embryo transfer (control group). Matching was done for age of patients, number, and quality of embryos (Day 5 embryos). Data concerning maternal characteristics, survival rate of warming procedure, implantation, pregnancy, ongoing pregnancy, and live birth rates were collected. A lower implantation rate was found for cryopreserved embryo replacement compared to transferring fresh embryos. Live birth rate was found to be equal in both groups.

authors

Shebl O,Ebner T,Sommergruber M,Sir A,Tews G

doi

10.1080/00016340903093575

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

944-7

issue

8

eissn

0001-6349

issn

1600-0412

pii

912758023

journal_volume

88

pub_type

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