title: Estimation of births averted by family planning programs: the parity approach.
mesh_terms: D000328:Adult; D000367:Age Factors; D003267:Contraception / Q000706:statistics & numerical data; D003276:Contraceptives, Oral; D003710:Demography; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D006801:Humans; D007434:Intrauterine Devices / Q000706:statistics & numerical data; D008722:Methods; D009042:Motivation; D010298:Parity; D011647:Puerto Rico; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D013245:Sterilization, Reproductive
chemical_list: D003276:Contraceptives, Oral