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The effect of short-term exposure of cumulus-oocyte complexes to in vitro maturation medium on yield of mature oocytes and usable embryos in stimulated cycles

  • C. R. Sacha
  • D. J. Kaser
  • L. V. Farland
  • S. Srouji
  • S. A. Missmer
  • C. Racowsky
Assisted Reproduction Technologies
  • 111 Downloads

Abstract

Purpose

We examined whether short-term exposure to in vitro maturation (IVM) medium of cumulus-oocyte complexes (COCs) from a stimulated cycle increases the yield of metaphase II (MII) oocytes and usable embryos.

Methods

Retrospective review of two consecutive autologous IVF/ICSI cycles per patient between 2007 and 2015 in which cycle 1 did not result in live birth. Patients with short-term exposure of COCs to IVM medium (3–5 h before standard insemination or ICSI) in cycle 2 (treated) were matched 1:4 on %MI and %MII to patients without use of IVM in cycle 2 (untreated). The proportions of mature oocytes, two pronucleate (2PN) zygotes, number of usable embryos, and clinical outcomes were compared between groups with regression modeling.

Results

The treated (n = 43) and untreated (n = 163) groups had similar demographic characteristics and similarly high proportions of immature oocytes (48.2 vs. 41.3%, respectively) in cycle 1. There were no significant differences between the treated and untreated groups in the change in %MII (48.1 to 68.9% vs. 50.5 to 72.5%, respectively) or mean number of usable embryos (2.2 to 3.4 vs. 2.0 to 3.3, respectively) from cycle 1 to cycle 2.

Conclusions

These findings suggest that short-term IVM incubation of COCs may not provide any additional benefit in patients with a prior unsuccessful cycle notable for a high proportion of immature oocytes. Further randomized studies are warranted to determine whether there is a subset of patients who may have improved clinical outcomes with this “rescue IVM” intervention.

Keywords

In vitro maturation Oocytes IVF Maturity 

Notes

Acknowledgements

The authors acknowledge the Brigham and Women’s Hospital Embryology team for their assistance in data retrieval.

Compliance with ethical standards

This retrospective study was approved by the Partners’ Healthcare Institutional Review Board.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • C. R. Sacha
    • 1
  • D. J. Kaser
    • 1
  • L. V. Farland
    • 1
    • 2
  • S. Srouji
    • 1
  • S. A. Missmer
    • 1
    • 2
  • C. Racowsky
    • 1
  1. 1.Department of Obstetrics & GynecologyBrigham & Women’s Hospital and Harvard Medical SchoolBostonUSA
  2. 2.Department of EpidemiologyHarvard T. H. Chan School of Public HealthBostonUSA

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