Research
Hormonal
A single morning urinary melatonin measurement is a reasonable marker for long-term melatonin levels among premenopausal women.
Practitioners can use a single morning urinary melatonin measurement to estimate long-term melatonin levels in premenopausal women.
GoodSupportsmedium confidence
A single morning urinary melatonin measurement is a reasonable marker for long-term melatonin levels among premenopausal women.
Why this rating
Based on the reproducibility assessment over a 3-year period.
Source
Epidemiology of Urinary Melatonin in Women and Its Relation to Other Hormones and Night Work
Eva Schernhammer et al. · Cancer Epidemiology Biomarkers & Prevention · 2004
DOI 10.1158/1055-9965.936.13.6
cohort · n=80Cited 215×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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