Menarcheal age and miscarriage.
D000022:Abortion, Spontaneous / Q000453:epidemiology / Q000209:etiology*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008572:Menarche; D008875:Middle Aged; D011247:Pregnancy; D012306:Risk