Maternal use of oral contraceptives and risk of birth defects in Denmark: prospective, nationwide cohort study
OPEN BMJ (Clinical research ed.) | 8 Jan 2016
BM Charlton, D Mølgaard-Nielsen, H Svanström, J Wohlfahrt, B Pasternak and M Melbye
Is oral contraceptive use around the time of pregnancy onset associated with an increased risk of major birth defects?
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