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Silicon Republic
Data on testosterone levels in women outdated, limiting – study
Hertility conducted a comprehensive study involving over 30,000 women in the UK and Ireland to assess the state of testosterone testing for women. The findings indicate that average testosterone levels used in assessments are based on outdated data, using cohorts that inadequately represent women's health today. As testosterone levels progressively decline from a woman’s 20s, reliance on broad, one-size-fits-all testing methods leads to misdiagnosis and confusion in healthcare practices. Researchers recommend transitioning to age-specific testing standards to enhance diagnostic precision.
MonitorConfidence: MediumMid term horizon
Published 19 Aug 2026, 14:55 UTC3 min read
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Summary
TL;DR
- Over 30,000 women studied for testosterone levels.
- Current testing norms based on small validation studies.
- Outdated data results in diagnostic inaccuracies.
- Testosterone levels drop by approximately 1.4% per year post-20s.
- Call for age-continuous hormone reference ranges.
Interesting facts
- The study is the largest of its kind in the region.
- Findings challenge the traditional view of a sudden drop in hormone levels during perimenopause.
- Currently used 'normal' levels are based on a limited sample size.