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    Evidence

    Reference Library

    All evidence cited in this tool.

    • Every clinical claim, statistic, and recommendation is traceable to peer-reviewed research or authoritative UK guidance.
    Browse the References

    Curated by Dr Divpreet Sacha (MBChB MRCGP DOccMed).

    59

    peer-reviewed sources and authoritative references

    7

    categories, from prevalence to legal

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    1. Liang Y et al. (2025)

      Global prevalence and trends of infertility 1990–2021

      Human Reproduction. 40(3):529–544

    2. HFEA (2025)

      Fertility Treatment 2023: Trends and Figures

      Human Fertilisation and Embryology Authority. www.hfea.gov.uk

    3. Golombok S (2021)

      We Are Family: The Modern Transformation of Parents and Children

      Scribe Publications

    4. Berni TR et al. (2025)

      Rising incidence, health resource utilization, and costs of polycystic ovary syndrome in the United Kingdom

      Journal of Clinical Endocrinology & Metabolism. 110(5):e1580–e1589. doi:10.1210/clinem/dgae518. CPRD Aurum primary-care data to 2020

    5. Endometriosis UK (2026)

      Endometriosis Diagnosis Survey, updated diagnostic delay figure: 9 years 4 months

      Endometriosis UK Press Release. March 2026. www.endometriosis-uk.org

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