| Literature DB >> 1483529 |
Abstract
Keywords: Americas; Biology; Contraception; Contraception Failure; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Postcoital; Contraceptive Agents, Progestin; Contraceptive Effectiveness; Contraceptive Methods; Contraceptive Usage; Critique; Demographic Factors; Developed Countries; Endocrine System; Estrogens; Family Planning; Fertility; Fertility Measurements; Hormones; Literature Review; Measurement; North America; Northern America; Oral Contraceptives; Oral Contraceptives, Combined; Physiology; Population; Population Dynamics; Pregnancy Rate; Research Methodology; United States
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Year: 1992 PMID: 1483529
Source DB: PubMed Journal: Fam Plann Perspect ISSN: 0014-7354