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Abstract
Mesh: See more » Contraception/methodsContraceptives, Postcoital, SyntheticFemaleHumansIntrauterine DevicesTime Factors
Substances: See more » Contraceptives, Postcoital, Synthetic
Year: 1991 PMID: 2025698 PMCID: PMC1669194 DOI: 10.1136/bmj.302.6780.801
Source DB: PubMed Journal: BMJ ISSN: 0959-8138