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Partner Ethnicity and Assisted Reproductive Technology Outcomes: A Retrospective Cohort Study.

Shu Qin Wei1, Michael H Dahan1,2, Yu Lu1

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|December 30, 2025
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Summary
This summary is machine-generated.

Partner ethnicity impacts in vitro fertilization (IVF) success rates. Non-White partners were linked to lower clinical pregnancy and live birth rates in a UK study.

Keywords:
assisted reproductive techniquesclinicalcohort studiesethnic groupsfertilization in vitrolive birthpregnancy

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Area of Science:

  • Reproductive Medicine
  • In Vitro Fertilization (IVF)
  • Health Disparities

Background:

  • Assisted reproductive technology (ART) has advanced, yet clinical outcome disparities persist.
  • Patient factors influencing ART outcomes are well-researched, but partner ethnicity's role is less understood.
  • This study investigates the impact of partner ethnicity on ART success.

Purpose of the Study:

  • To examine the association between partner ethnicity and outcomes of in vitro fertilization (IVF).
  • To determine if partner ethnicity independently influences pregnancy and live birth rates.
  • To identify potential disparities in ART outcomes based on partner ethnicity.

Main Methods:

  • Retrospective cohort study of 158,813 IVF cycles in the UK (2017-2018).
  • Exposure variable: partner ethnicity.
  • Outcomes analyzed: biochemical pregnancy, clinical pregnancy, pregnancy loss, and live birth.
  • Multivariable regression models adjusted for patient age, partner age, patient ethnicity, gravidity, infertility diagnosis, treatment type, preimplantation genetic testing for aneuploidy, and prior IVF cycles.

Main Results:

  • Live birth rates were 26.3% for White partners and 23.1% for non-White partners.
  • Non-White partners showed a 5% lower clinical pregnancy rate (RR 0.95) and 6% lower live birth rate (RR 0.94).
  • Black and Asian partners had significantly reduced live birth rates, especially when both partners belonged to these ethnic groups, even after adjusting for patient ethnicity.

Conclusions:

  • Partner ethnicity is independently associated with IVF outcomes, with non-White partners experiencing lower success rates.
  • These findings highlight the clinical significance of partner ethnicity in reproductive outcomes.
  • Further research is needed to understand the underlying mechanisms driving these observed ethnic disparities in IVF.