title: Sponge proves highly effective after second year of comparative trials.
mesh_terms: D000569:Americas; D001723:Birth Rate; D003267:Contraception; D003274:Contraceptive Devices, Female; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D004467:Economics; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005298:Fertility; D009656:North America; D010298:Parity; D011153:Population; D011157:Population Dynamics; D018873:Pregnancy Rate; D012106:Research; D012107:Research Design; D013672:Technology; D014481:United States
keywords: Americas; Barrier Methods; Clinical Research; Contraception; Contraceptive Effectiveness; Contraceptive Methods; Demographic Factors; Developed Countries; Developing Countries; Economic Factors; Evaluation; Family Planning; Fertility; Fertility Measurements; Measurement; North America; Northern America; Parity; Population; Population Dynamics; Pregnancy Rate; Qualitative Evaluation; Research And Development; Research Methodology; Technology; United States; Use-effectiveness; Vaginal Barrier Methods; Vaginal Diaphragm; Vaginal Sponge