Trends in contraceptive practice: 1965-1973.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003267:Contraception / Q000379:methods*; D003273:Contraceptive Devices; D003276:Contraceptives, Oral; D005260:Female; D006801:Humans; D008297:Male; D013245:Sterilization, Reproductive; D014481:United States
D003276:Contraceptives, Oral