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Related Experiment Videos

Bidirectional Associations Between Circulating Polyunsaturated Fatty Acids and Female Reproductive Endocrine-Related

YiLian Pan1,2,3, Jilan Jiang1,2,3, Feng Sun1,2,3

  • 1Department of Gynecology & Obstetrics, International Peace Maternity & Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.

International Journal of Women'S Health
|July 14, 2026
PubMed
Summary

Related Concept Videos

Oogenesis02:07

Oogenesis

In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...

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Reproductive biomedicine online·2022

Higher omega-6 fatty acids increase risks for endometriosis and infertility, while balanced ratios offer protection. Polycystic ovary syndrome disrupts omega-3 levels, indicating a complex interplay with polyunsaturated fatty acids in reproductive health.

Area of Science:

  • Reproductive Endocrinology
  • Nutritional Science
  • Genetic Epidemiology

Background:

  • Polyunsaturated fatty acids (PUFAs) are suspected to influence female reproductive endocrine disorders.
  • Causal links between PUFAs and conditions like endometriosis, infertility, PCOS, PMS, and POI require clarification.

Purpose of the Study:

  • To investigate the bidirectional causal relationships between circulating PUFAs (omega-3/6 subtypes, DHA, linoleic acid) and major female reproductive disorders using Mendelian randomization.
  • To identify PUFAs as potential risk or protective factors for these conditions.

Main Methods:

  • A two-sample Mendelian randomization (MR) study utilizing large-scale genome-wide association study (GWAS) data from European populations.
  • Forward MR to assess PUFA effects on disorders; reverse MR to evaluate disorder-driven PUFA changes.
Keywords:
endometriosisinfertilityomega-3 fatty acidspolycystic ovary syndromepolyunsaturated fatty acidstwo-sample mendelian randomization

Related Experiment Videos

  • Sensitivity analyses including MR-Egger, MR-PRESSO, and leave-one-out methods to ensure result robustness.

    • Main Results:

    • Elevated linoleic acid and omega-6 levels were associated with increased risk of endometriosis and infertility.
    • Higher ratios of PUFAs to total fatty acids showed a protective effect against endometriosis.
    • Polycystic ovary syndrome (PCOS) was genetically linked to reduced docosahexaenoic acid (DHA) and omega-3 levels, alongside increased omega-6/3 ratios.

    Conclusions:

    • Linoleic acid and omega-6 PUFAs may be risk factors for endometriosis and infertility; balanced PUFA ratios could be protective.
    • PCOS disrupts omega-3 homeostasis, suggesting a bidirectional metabolic relationship.
    • PUFAs represent potential modifiable targets for nutritional and therapeutic interventions in female reproductive health, meriting further research.