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

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)841-849
Number of pages9
JournalJournal of Assisted Reproduction and Genetics
Volume35
Issue number5
DOIs
StatePublished - Mar 14 2018
Externally publishedYes

Keywords

  • In vitro maturation
  • IVF
  • Maturity
  • Oocytes

ASJC Scopus subject areas

  • Reproductive Medicine
  • Genetics
  • Obstetrics and Gynecology
  • Developmental Biology
  • Genetics(clinical)

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