title: Reproductive endocrinology: menstrual cycle lengths--what can they tell us?
authors.forename: Shahla
authors.initials: S
authors.lastname: Nader
mesh_terms: D004704:Endocrinology / Q000639:trends; D005260:Female; D005298:Fertility / Q000502:physiology; D006801:Humans; D008597:Menstrual Cycle / Q000378:metabolism*; D008659:Metabolic Diseases / Q000453:epidemiology / Q000378:metabolism; D012098:Reproduction / Q000502:physiology*; D013997:Time Factors