title: Human serum melatonin changes during the menstrual cycle.
abstract: Serum melatonin concentration in early morning during the menstrual cycle, studied in five healthy women, showed that melatonin was elevated at the time of menstrual bleeding and had its nadir at the time of the menstrual cycling in humans.
mesh_terms: D000328:Adult; D000818:Animals; D001681:Biological Assay; D005260:Female; D006801:Humans; D007814:Larva; D008550:Melatonin / Q000097:blood* / Q000494:pharmacology; D008598:Menstruation; D010060:Ovulation; D010870:Pineal Gland / Q000187:drug effects; D014981:Xenopus
chemical_list: D008550:Melatonin