Overview Varenicline Pregnancy Cohort Study Status: Completed Trial end date: 2016-05-01 Target enrollment: Participant gender: Summary A prospective population-based cohort study to examine whether varenicline use during pregnancy is associated with an increased risk of major congenital malformations in infants above that associated with smoking during pregnancy. Details Lead Sponsor: PfizerCollaborators: Karolinska InstitutetUniversity of AarhusTreatments: Varenicline