| Literature DB >> 4730757 |
Abstract
Entities:
Keywords: Acceptor Characteristics; Acceptors; Americas; Asia; China; Clinical Research; Colombia; Comparative Studies; Contraception; Contraception Continuation--statistics; Contraception Failure; Contraception Termination; Contraceptive Effectiveness; Contraceptive Methods; Contraceptive Usage; Developing Countries; Eastern Asia; Evaluation; Examinations And Diagnoses; Family Planning; Iran; Iud; Iud, Copper Releasing; Iud, Unmedicated; Korea; Korea, Republic Of; Latin America; Life Table Method; Mathematical Model; Parity; Pregnancy; Reproduction; Research Methodology; Research Report; Retention; Sampling Studies; Size; South America; Southern Asia; Statistical Studies; Studies; Taiwan; Thailand; Use-effectiveness
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Year: 1973 PMID： 4730757
Source DB: PubMed Journal: Stud Fam Plann ISSN： 0039-3665