The U.S. fertility decline, 1961-1975: the contribution of changes in marital status and marital fertility.
Changes in marital fertility have accounted for 83 percent of the decline in total fertility since 1971; changes in marital status accounted for 19 percent, and changes in nonmarital fertility had only a negligible effect. Declines in the level of marital fertility account for a substantial part of the overall decrease; postponement of childbearing did not occur in any significant degree until the 1970s.
D000293:Adolescent; D000328:Adult; D005260:Female; D005298:Fertility; D006801:Humans; D008393:Marriage; D008423:Maternal Age; D011247:Pregnancy; D013223:Statistics as Topic; D014481:United States