Periconceptional Folic Acid Supplementation and Infant Risk of Congenital Heart Defects in Norway 1999-2009.
Elisabeth LeirgulTrude GildestadRoy Miodini NilsenTatiana FominaKristoffer BrodwallGottfried GreveStein Emil VollsetHenrik HolmstrømGrethe S TellNina ØyenPublished in: Paediatric and perinatal epidemiology (2015)
Periconceptional folic acid supplement use showed no association with severe CHDs in the newborn. An unexpected association with an increased risk of septal defects warrants further investigation.