Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleSelection Bias Associated with Contraceptive Practice in Time-to-Pregnancy Studies.AuthorsBAIRD, DONNA DAY; WEINBERG, CLARICE R.; SCHWINGL, PAMELA; WILCOX, ALLEN J.PublicationAnnals of the New York Academy of Sciences, 1994, Vol 709, Issue 1, p156ISSN0077-8923Publication typeArticleDOI10.1111/j.1749-6632.1994.tb30395.x