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.
Curated by Dr Divpreet Sacha (MBChB MRCGP DipOccMed).
58
peer-reviewed sources and authoritative references
7
categories, from prevalence to legal
Liang Y et al. (2025)
Global prevalence and trends of infertility 1990–2021
Human Reproduction. 40(3):529–544
HFEA (2025)
Fertility Treatment 2023: Trends and Figures
Human Fertilisation and Embryology Authority. www.hfea.gov.uk
Golombok S (2021)
We Are Family: The Modern Transformation of Parents and Children
Scribe Publications
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
Endometriosis UK (2026)
Endometriosis Diagnosis Survey - updated diagnostic delay figure: 9 years 4 months
Endometriosis UK Press Release. March 2026. www.endometriosis-uk.org