| Literature DB >> 4990241 |
Abstract
Entities:
Keywords: Acceptor Characteristics; Age Factors; Americas; Birth Rate; Contraception; Contraceptive Effectiveness; Contraceptive Methods; Contraceptive Usage; Demographic Factors; Developed Countries; District Of Columbia; Economic Factors; Education; Family Planning; Family Planning Programs; Fertility; Fertility Measurements; Fertility Rate; Iud; Low Income Population; Marital Status; North America; Northern America; Nuptiality; Oral Contraceptives; Parity; Population; Population Characteristics; Population Dynamics; Research Methodology; Retrospective Studies; Sampling Studies; Social Class; Socioeconomic Factors; Socioeconomic Status; Studies; Surveys; United States; Urban Population; Use-effectiveness; Vaginal Foam; Vaginal Spermicides
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Year: 1970 PMID： 4990241 PMCID： PMC2031779
Source DB: PubMed Journal: Public Health Rep ISSN： 0094-6214 Impact factor: 2.792