Influences on age of menarche.
D000293:Adolescent; D000367:Age Factors; D001823:Body Composition; D001827:Body Height; D002648:Child; D005260:Female; D006801:Humans; D008027:Light; D008572:Menarche; D009146:Music; D011247:Pregnancy; D012424:Rural Population; D012959:Socioeconomic Factors; D014427:Twins; D014505:Urban Population