title: [An epidemiological investigation on the effect of tubal ligation in Henan province].
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Tong
mesh_terms: D001208:Asia; D001723:Birth Rate; D002681:China; D003625:Data Collection; D003710:Demography; D003906:Developing Countries; D004812:Epidemiologic Methods; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005202:Asia, Eastern; D005298:Fertility; D011153:Population; D011157:Population Dynamics; D018873:Pregnancy Rate; D012106:Research; D012107:Research Design; D012189:Retrospective Studies; D013223:Statistics as Topic; D013245:Sterilization, Reproductive; D013246:Sterilization, Tubal
keywords: Asia; China; Data Analysis; Data Collection; Demographic Factors; Developing Countries; Eastern Asia; Epidemiologic Methods; Evaluation; Family Planning; Female Sterilization; Fertility; Fertility Measurements; Madlener Method; Measurement; Pomeroy Method; Population; Population Dynamics; Pregnancy Rate; Research Methodology; Retrospective Studies; Sterilization, Sexual; Studies; Tubal Ligation; Tubal Occlusion; Uchida Method