Contraceptive use patterns, prior source, and pregnancy history of female family planning patients: United States, 1980.
D000328:Adult; D003270:Contraceptive Agents; D003273:Contraceptive Devices / Q000706:statistics & numerical data*; D005193:Family Planning Services / Q000639:trends*; D005260:Female; D006761:Hospitals; D006801:Humans; D011247:Pregnancy; D014481:United States