title: Births averted under family planning programme:  a mathematical approach.
abstract: "In this paper a probability model is proposed to describe the distribution of births to couples in first T years of marriage, when T is large and/or when couples use various methods of family planning.  This model is derived on the assumption that conditional instantaneous risk of a conception, the incidence of foetal loss and the chance of attaining [sterility] following a child birth are functions of parity....The application of the model in evaluation of family planning programme changes in the child bearing pattern is illustrated."
authors.forename: B N
authors.initials: BN
authors.lastname: Bhattacharya
authors.forename: K K
authors.initials: KK
authors.lastname: Singh
authors.forename: A D
authors.initials: AD
authors.lastname: Taskar
authors.forename: O P
authors.initials: OP
authors.lastname: Srivastava
mesh_terms: D001723:Birth Rate; D003267:Contraception; D003268:Contraception Behavior; D003710:Demography; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005298:Fertility; D005313:Fetal Death; D006285:Health Planning; D007246:Infertility; D008722:Methods; D008962:Models, Theoretical; D009026:Mortality; D009934:Organization and Administration; D010298:Parity; D011153:Population; D011157:Population Dynamics; D011336:Probability; D015397:Program Evaluation; D012098:Reproduction; D012106:Research; D013223:Statistics as Topic
keywords: Births Averted; Contraception; Contraceptive Usage; Demographic Factors; Demographic Impact; Evaluation; Evaluation Methodology; Family Planning; Family Planning Program Evaluation; Family Planning Programs; Fecundability; Fecundity; Fertility; Fertility Measurements; Fetal Death; Infertility; Mathematical Model; Methodological Studies; Models, Theoretical; Mortality; Organization And Administration; Parity; Population; Population Dynamics; Probability; Program Evaluation; Programs; Reproduction; Research Methodology; Statistical Studies; Studies