Who prescribed them?
If your FP/OB prescribed them, I would venture a guess that the meds are safe.
If a Neurologist prescribed them, I would similarly presume s/he researched the drug's teratogen class. Safety for the baby is dependent on timing in embryogenesis/fetal development, drug type, and whether it can cross over the placental barrier to access fetal blood. PDR will give Class; know info is of limited value.