title: "Menarcheal age and spontaneous abortion: a causal connection".
mesh_terms: D000022:Abortion, Spontaneous / Q000209:etiology*; D000293:Adolescent; D000328:Adult; D000375:Aging; D002140:California; D005260:Female; D006801:Humans; D008572:Menarche; D008875:Middle Aged; D010298:Parity; D011247:Pregnancy