C F Westoff, L Bumpass, N B Ryder. Show Affiliations »
Abstract
Mesh: See more » AdultCoitusContraceptives, OralFemaleFertilityHumansPregnancyTime Factors
Substances: See more » Contraceptives, Oral
Year: 1969 PMID: 5803567 DOI: 10.1080/19485565.1969.9987794
Source DB: PubMed Journal: Soc Biol ISSN: 0037-766X