Prenatal exposure to valproate and risk of congenital malformations—Could we have known earlier?—A population‐based cohort study

Prenatal exposure to the antiseizure medication (ASM) valproate is associated with an increased risk of congenital malformations, but warnings against the use of valproate in pregnancy were not issued until 2009. The objective was to study how early administrative health registers could have identified the teratogenic risk associated with valproate.This was a population-based cohort study of individual-linked data from Danish health care and...