Cervical caps, diaphragms provide equal protection from pregnancy.
D001723:Birth Rate; D003267:Contraception; D003268:Contraception Behavior; D003274:Contraceptive Devices, Female; D003710:Demography; D004467:Economics; D005193:Family Planning Services; D005298:Fertility; D011153:Population; D011157:Population Dynamics; D018873:Pregnancy Rate; D012106:Research; D012107:Research Design; D013672:Technology
Barrier Methods; Cervical Cap; Contraception; Contraception Failure; Contraceptive Methods; Contraceptive Usage; Demographic Factors; Economic Factors; Family Planning; Fertility; Fertility Measurements; Measurement; Population; Population Dynamics; Pregnancy Rate; Research And Development; Research Methodology; Technology; Vaginal Barrier Methods; Vaginal Diaphragm