title: Sharp drop in U.S. marital fertility in 1960s due to 50 percent reduction in unwanted, mistimed births.
mesh_terms: D001723:Birth Rate; D004522:Educational Status; D005260:Female; D005298:Fertility; D006801:Humans; D008393:Marriage; D011247:Pregnancy; D011275:Pregnancy, Unwanted; D014481:United States