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Related Experiment Videos

Polypronuclear embryos after in vitro fertilization.

P V Dandekar1, M C Martin, R H Glass

  • 1Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California-San Francisco 94143.

Fertility and Sterility
|March 1, 1990
PubMed
Summary

Triploidy, a condition where embryos have three sets of chromosomes, occurs in 1-3% of conceptions. In vitro fertilization (IVF) did not show increased triploidy risk with different stimulation protocols, but male factor infertility reduced its occurrence.

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Area of Science:

  • Reproductive Biology
  • Human Genetics
  • Assisted Reproductive Technology

Background:

  • Triploidy is a significant chromosomal abnormality affecting 1-3% of recognized pregnancies.
  • In vitro fertilization (IVF) procedures, involving high sperm concentrations, raise concerns about potentially increased triploidy risk.
  • Oocyte quality, influenced by stimulation protocols, may also play a role in triploidy development.

Purpose of the Study:

  • To investigate the incidence of triploidy in IVF cycles.
  • To determine if different ovarian stimulation protocols affect triploidy rates.
  • To assess the impact of male factor infertility on triploidy occurrence in IVF.

Main Methods:

  • Retrospective analysis of IVF cycles.
  • Comparison of triploidy rates between clomiphene citrate/human menopausal gonadotropin (CC/hMG) and gonadotropin-releasing hormone analog/human menopausal gonadotropin (GnRH-a/hMG) stimulation protocols.

Related Experiment Videos

  • Analysis of triploidy rates based on the cause of infertility, specifically male factor versus other causes.

    • Main Results:

    • No significant difference in triploidy rates was observed between CC/hMG (3.2%) and GnRH-a/hMG (4.4%) stimulation protocols.
    • Triploidy was significantly less common in cycles involving male factor infertility (0.7%) compared to other infertility causes (3.4%-3.8%).
    • Triploid embryos are morphologically similar to diploid embryos at cleavage stages, making visual identification challenging.

    Conclusions:

    • Ovarian stimulation protocols do not appear to significantly influence triploidy rates in IVF.
    • Male factor infertility is associated with a lower incidence of triploidy in IVF.
    • The accurate identification and exclusion of triploid embryos based on pronuclear counts are crucial in IVF laboratory practices.