title: Epidemiology of spontaneous abortions--the effect of previous abortions.
mesh_terms: D000026:Abortion, Habitual / Q000453:epidemiology*; D000028:Abortion, Induced; D000022:Abortion, Spontaneous / Q000453:epidemiology*; D005260:Female; D006801:Humans; D009825:Oklahoma; D011247:Pregnancy; D012306:Risk