The risk of fetal congenital malformations is  highest for women taking sodium valproate (10.7 per 100).

According to a Cochrane review- Children exposed to sodium valproate in utero
had a significantly lower developmental quotient when compared with those born to WWE who were not taking AEDs, and to those born to women without epilepsy. The intelligence quotient (IQ), verbal IQ and performance IQ were lower in children
exposed to sodium valproate.