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Erschienen in: Journal of Assisted Reproduction and Genetics 1/2017

10.11.2016 | Assisted Reproduction Technologies

Optimal embryo transfer strategy in poor response may include freeze-all

verfasst von: Murat Berkkanoglu, Kevin Coetzee, Hasan Bulut, Kemal Ozgur

Erschienen in: Journal of Assisted Reproduction and Genetics | Ausgabe 1/2017

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Abstract

Purpose

In this retrospective cohort study, we investigated the best embryo transfer strategy in ICSI cycles with ≤4 oocytes collected at oocyte retrieval.

Methods

Women who underwent antagonist co-treatment COS for ICSI treatment between January 2010 and December 2015 at a private ART clinic (N = 2263). Eight hundred seventy-nine women (group 1) had ≤4 oocytes collected at oocyte retrieval, of whom 645 (group A) had cleavage stage embryo transfer (ET), and 234 (group B) had blastocyst ET. One thousand three hundred eighty-four women (group 2) had 10–15 oocytes collected at oocyte retrieval, of whom 676 (group C) had cleavage stage ET, and 708 women (group D) had blastocyst ET. Blastocyst vitrification was performed using the Cryotop method and FET using artificial cycles.

Results

In group 1, the cancellation rate was significantly lower in group A (25.2 vs 38 %). The pregnancy rate (PR), clinical PR, implantation rate (IR), and live birth rate (LBR) per ET and per oocyte retrieval were all lower in group A. The clinical PR, IR, and LBR per ET of vitrified-warmed blastocyst ET were significantly the highest. In group 2, the cycle cancellation rate was significantly lower in group C (3.5 vs 13.4 %). The PR, clinical PR, and IR per ET and per oocyte retrieval were all lower in group C. The LBR per ET was significantly lower, but the LBR per oocyte retrieval was not significantly lower in group C. Again, the PR, clinical PR, and IR per ET of vitrified-warmed blastocyst ET were significantly the highest.

Conclusions

Day 5 ET strategy has been reserved for normal or high responders. The improved pregnancy outcomes from blastocyst culture and cryopreservation may challenge ART to extend this benefit to poor responders.
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Metadaten
Titel
Optimal embryo transfer strategy in poor response may include freeze-all
verfasst von
Murat Berkkanoglu
Kevin Coetzee
Hasan Bulut
Kemal Ozgur
Publikationsdatum
10.11.2016
Verlag
Springer US
Erschienen in
Journal of Assisted Reproduction and Genetics / Ausgabe 1/2017
Print ISSN: 1058-0468
Elektronische ISSN: 1573-7330
DOI
https://doi.org/10.1007/s10815-016-0825-y

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