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Journal of Assisted Reproduction and Genetics

Frozen embryo transfer can be performed in the cycle immediately following the freeze-all cycle

  • 01-01-2018
  • Assisted Reproduction Technologies
Published in:
Authors
Kemal Ozgur
Hasan Bulut
Murat Berkkanoglu
Peter Humaidan
Kevin Coetzee
Published in
Journal of Assisted Reproduction and Genetics | Issue 1/2018

Abstract

Purpose

In this study, we investigated whether the time interval between oocyte retrieval and frozen embryo transfer (FET) affected the live birth (LB) rates of human segmented-IVF cycles.

Method

A total of 1338 ICSI freeze-all cycles were performed between February 2015 and January 2016, with 1121 FET cycles being retrospectively analyzed. All vitrified-warmed blastocyst transfers were performed in artificial FET cycles, using gonadotropin-releasing hormone (GnRH) agonist downregulation and oral estrogen endometrial preparation. The primary outcome measure was LB. Cycles were investigated in oocyte retrieval-to-FET interval groups of 32–46, 47–61, 62–76, 77–91, and ≥ 92 days, with the 47–61-day group used as the reference group.

Results

There were no significant differences in LB rates between the groups in the overall analysis, as well as, in sub-analyses investigating LB in terms of single blastocyst transfer (SBT), trigger type (GnRH agonist, triggers including hCG), oocyte number (≤ 5 and ≥ 15), and maternal age (> 35 years).

Conclusion

The present study showed that it is feasible to perform transfers 36 days after oocyte retrieval and that delaying FET in freeze-all beyond the cycle immediately following oocyte retrieval does not increase LB rates.
Title
Frozen embryo transfer can be performed in the cycle immediately following the freeze-all cycle
Authors
Kemal Ozgur
Hasan Bulut
Murat Berkkanoglu
Peter Humaidan
Kevin Coetzee
Publication date
01-01-2018
Publisher
Springer US
Published in
Journal of Assisted Reproduction and Genetics / Issue 1/2018
Print ISSN: 1058-0468
Electronic ISSN: 1573-7330
DOI
https://doi.org/10.1007/s10815-017-1048-6
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