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Related Experiment Videos

Ureaplasma in semen and IVF.

J M Montagut1, S Leprêtre, J Degoy

  • 1I. F. R. E. A. R. E. S-Toulouse, Laboratoire de Biologie de la Reproduction, France.

Human Reproduction (Oxford, England)
|May 1, 1991
PubMed
Summary

Ureaplasma urealyticum infection in IVF candidates is common, affecting 42% of couples. While not impacting fertilization, U.U. infection significantly reduces pregnancy rates after embryo transfer.

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Area of Science:

  • Reproductive Medicine
  • Microbiology
  • Infertility Research

Background:

  • Ureaplasma urealyticum (U.U.) screening is standard practice before in vitro fertilization (IVF).
  • U.U. infections are frequently detected in couples undergoing fertility evaluations.
  • The prevalence and impact of U.U. on IVF outcomes require further elucidation.

Purpose of the Study:

  • To investigate the prevalence of U.U. infection in couples undergoing IVF.
  • To assess the effect of U.U. infection on various IVF parameters, including fertilization, embryo development, and pregnancy rates.
  • To explore the potential role of U.U. in endometrial receptivity.

Main Methods:

  • Systematic screening for U.U. in pre-IVF cycle testing.
  • Analysis of U.U. infection in semen fractions (ejaculate, prostatic, seminal vesicle levels).
  • Comparison of IVF outcomes (fertilization, embryo retrieval, pregnancy rates) between U.U.-infected and non-infected groups.
  • Preliminary prospective study on U.U. and endometrial factors.

Main Results:

  • U.U. infection was identified in 42% of couples, with monomicrobial infections in at least one partner.
  • U.U. was found in 32% of ejaculate fractions and at prostatic/seminal vesicle levels.
  • No significant difference in cytological abnormalities or fertilization parameters between infected and non-infected groups.
  • A significant reduction in pregnancy rates post-embryo transfer was observed in the U.U.-infected group.
  • U.U. did not affect embryo retrieval or pregnancy rates per puncture.

Conclusions:

  • Ureaplasma urealyticum infection is prevalent in IVF candidates and significantly reduces post-embryo transfer pregnancy rates.
  • U.U. does not appear to impair fertilization or embryo development.
  • Preliminary evidence suggests Ureaplasma may play a role at the endometrial level, impacting implantation.

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