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Updated: Apr 4, 2026

Author Spotlight: Investigating the Mechanisms and Inducing Models of Polycystic Ovary Syndrome
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Bidirectional and Multivariable Mendelian Randomization Study of PCOS and VTE.

Lifang You1, Hongyin Cui1, Fen Zhao1

  • 1Department of Gynecology and Obstetrics, First People's Hospital of Linping District, Hangzhou, 311100, People's Republic of China.

International Journal of Women'S Health
|April 3, 2026
PubMed
Summary
This summary is machine-generated.

Genetic analysis found no causal link between polycystic ovary syndrome (PCOS) and venous thromboembolism (VTE). Body mass index (BMI) showed an independent association with increased VTE risk, suggesting it is a key factor.

Keywords:
body mass indexgenetic epidemiologymendelian randomizationmultivariable analysispolycystic ovary syndromevenous thromboembolism

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Area of Science:

  • Genetics
  • Epidemiology
  • Metabolic Disorders

Background:

  • Polycystic ovary syndrome (PCOS) is a common endocrine disorder.
  • Venous thromboembolism (VTE) is a significant cause of morbidity and mortality.
  • The potential causal relationship between PCOS and VTE requires investigation.

Purpose of the Study:

  • To investigate the causal relationship between polycystic ovary syndrome (PCOS) and venous thromboembolism (VTE) using Mendelian randomization.
  • To assess the causal effect in both directions: PCOS influencing VTE and VTE influencing PCOS.

Main Methods:

  • Bidirectional two-sample Mendelian randomization (MR) analysis was employed.
  • European-ancestry Genome-Wide Association Studies (GWAS) summary statistics were utilized.
  • Multivariable MR adjusted for key confounders including BMI, diabetes, and hormone use.

Main Results:

  • Univariable and multivariable MR analyses found no evidence of a causal effect of PCOS on VTE.
  • Reverse MR analysis also showed no causal influence of VTE on PCOS.
  • Body mass index (BMI) demonstrated a significant independent positive association with VTE risk.

Conclusions:

  • Current genetic evidence does not support a causal link between PCOS and VTE.
  • BMI is an independent determinant of VTE risk.
  • Further research may explore the role of BMI in the PCOS-VTE association.