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Journal of Assisted Reproduction and Genetics

Published in:

01-07-2010 | Assisted Reproduction

RETRACTED ARTICLE: Can fresh embryo transfers be replaced by cryopreserved-thawed embryo transfers in assisted reproductive cycles? A randomized controlled trial

Authors: Abbas Aflatoonian, Homa Oskouian, Shahnaz Ahmadi, Leila Oskouian

Published in: Journal of Assisted Reproduction and Genetics | Issue 7/2010

Abstract

Purpose

Controlled ovarian hyperstimulation has been shown to advance endometrial maturation and adversely affects implantation in ART. It has been reported that there is a better embryo-endometrium synchrony in frozen-thawed embryo transfer cycles than fresh embryo transfer cycles. The objective of this study was to compare ongoing pregnancy rates between fresh ET and FET cycles.

Methods

In an open prospective, controlled study, the patients who were classified as high responders, were randomized to either fresh ET or FET. The embryos in FET group were cryopreserved with vitrification by Cryotop method.

Results

A total of 374 patients were included, 187 of which were randomized to FET and 187 to fresh ET. There were 39% (n = 73) ongoing pregnancy in FET group compared with 27.8% (n = 52) in fresh ET group[odds ratio = 1.66;95% confidence interval = 1.07–2.56; p = 0.02].

Conclusions

FETs can be performed instead of fresh ETs to improve the outcome of ART in highly selected patients.

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Title: RETRACTED ARTICLE: Can fresh embryo transfers be replaced by cryopreserved-thawed embryo transfers in assisted reproductive cycles? A randomized controlled trial
Authors: Abbas Aflatoonian
Homa Oskouian
Shahnaz Ahmadi
Leila Oskouian
Publication date: 01-07-2010
Publisher: Springer US
Published in: Journal of Assisted Reproduction and Genetics / Issue 7/2010
Print ISSN: 1058-0468
Electronic ISSN: 1573-7330
DOI: https://doi.org/10.1007/s10815-010-9412-9

At a glance: The STEP trials

Springer Medicine

RETRACTED ARTICLE: Can fresh embryo transfers be replaced by cryopreserved-thawed embryo transfers in assisted reproductive cycles? A randomized controlled trial

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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