Maternal use of oral contraceptives and risk of birth defects in Denmark: prospective, nationwide cohort study

Charlton, BrittanyMølgaard-Nielsen, DitteSvanström, HenrikWohlfahrt, JanPasternak, BjörnMelbye, Mads2017-10-112016Charlton, Brittany M, Ditte Mølgaard-Nielsen, Henrik Svanström, Jan Wohlfahrt, Björn Pasternak, and Mads Melbye. 2016. “Maternal Use of Oral Contraceptives and Risk of Birth Defects in Denmark: Prospective, Nationwide Cohort Study.” BMJ (January 6): h6712. doi:10.1136/bmj.h6712.1756-1833http://nrs.harvard.edu/urn-3:HUL.InstRepos:34191746en-USMaternal use of oral contraceptives and risk of birth defects in Denmark: prospective, nationwide cohort studyJournal Article2017-06-04201610.1136/bmj.h6712