Fertility regulation in the 21st century.
Newman
K
K
D000293:Adolescent; D003267:Contraception; D003269:Contraception, Immunologic; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D003281:Contraceptives, Postcoital; D004467:Economics; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D012106:Research; D013672:Technology
D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D003281:Contraceptives, Postcoital
Adolescents; Contraception, Immunological; Contraception--beneficial effects; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Effectiveness; Contraceptive Methods--beneficial effects; Economic Factors; Family Planning; Fertility Control, Postcoital; Oral Contraceptives--beneficial effects; Perfect Contraceptives; Research And Development; Technology; Theoretical Effectiveness