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New Belgian embryo transfer policy leads to sharp decrease in multiple pregnancy rate.

L Van Landuyt1, G Verheyen, H Tournaye

  • 1Centre for Reproductive Medicine, University Hospital, Vrije Universiteit Brussel, Laarbeeklaan 101, B-Brussels, Belgium. lisbet.vanlanduyt@az.vub.ac.be

Reproductive Biomedicine Online
|December 16, 2006
PubMed
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Belgium's 2003 embryo transfer policy significantly reduced multiple pregnancies, especially in women under 36. This fertility policy maintained clinical pregnancy rates without compromising outcomes.

Area of Science:

  • Reproductive Medicine
  • Public Health Policy
  • In Vitro Fertilization (IVF)

Background:

  • Belgium implemented a new fertility policy on July 1, 2003, to decrease multiple pregnancies.
  • The policy regulates the number of embryos transferred based on patient age and treatment cycle.

Purpose of the Study:

  • To evaluate the impact of Belgium's national embryo transfer policy on pregnancy outcomes.
  • To assess changes in human chorionic gonadotrophin (HCG) rates, clinical pregnancy rates, and multiple pregnancy rates.

Main Methods:

  • A comparative study analyzing two 15-month periods before and after the policy implementation.
  • Data stratified by patient age categories: <36, 36-39, and 40-42 years.
  • Key outcome measures included positive HCG, clinical pregnancy, and multiple pregnancy rates.

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Main Results:

  • Clinical pregnancy and HCG rates remained consistent post-policy (26.2% vs. 24.0% and 34.2% vs. 32.8%, respectively).
  • Overall multiple pregnancy rates decreased significantly from 29.1% to 9.5%.
  • A marked reduction in multiple pregnancies was observed in women under 36 (28.9% to 6.2%).

Conclusions:

  • The Belgian embryo transfer policy effectively reduced multiple pregnancies without negatively impacting clinical pregnancy rates.
  • Further consideration of elective single embryo transfer is recommended for women aged 36-39.
  • The policy demonstrated a significant (P < 0.001) decline in multiple births, primarily in younger age groups.