For women with epilepsy who are not taking medicines called antiepileptic drugs (AEDs), the chance of the baby having a major problem (such as fetal anticonvulsant syndrome (FACS)) is similar to the risk of women who do not have epilepsy. One study showed that approximately 3 babies out of 100 born to these women, would have a malformation.
This is a companion discussion topic for the original article at https://patient.info/pregnancy/fetal-anticonvulsant-syndrome-leaflet