title: Copper-7 IUD: clinicians, data support four years of use.
mesh_terms: D001723:Birth Rate; D003267:Contraception; D003710:Demography; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005298:Fertility; D007434:Intrauterine Devices; D007435:Intrauterine Devices, Copper; D011153:Population; D011157:Population Dynamics; D018873:Pregnancy Rate; D012106:Research; D012107:Research Design
keywords: Clinical Research; Contraception; Contraceptive Methods; Demographic Factors; Evaluation; Family Planning; Fertility; Fertility Measurements; Iud; Iud, Copper Releasing; Measurement; Population; Population Dynamics; Pregnancy Rate; Research Methodology