title: Validity of self-reported time to pregnancy.
authors.forename: Michael
authors.initials: M
authors.lastname: Joffe
mesh_terms: D005260:Female; D005306:Fertilization; D006801:Humans; D011247:Pregnancy; D011446:Prospective Studies; D012189:Retrospective Studies; D011795:Surveys and Questionnaires / Q000592:standards*; D013997:Time Factors