Field effectiveness of the oral and the intrauterine methods of contraception. The Baltimore Public Program, 1964-1966.
D000328:Adult; D003276:Contraceptives, Oral; D005006:Ethnicity; D005163:Factor Analysis, Statistical; D005191:Family Characteristics; D005193:Family Planning Services; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D008396:Maryland; D012959:Socioeconomic Factors
D003276:Contraceptives, Oral