Developmental Effects On Children Of Women Who Take Antiepileptic Drugs During Pregnancy

* Subject must be diagnosed with partial seizures and/or secondary generalization or primary generalized seizures (absence, atonic, myoclonic, and generalized tonic-clonic seizures) * Subjects must be on either carbamazepine, lamotrigine, phenytoin, or valproate monotherapy. * Mothers must not have a history of drug abuse (including alcohol) in the last year and have no sequelae of drug abuse. * Mothers must be able to maintain an accurate seizure diary of major motor seizures * Subjects must have an IQ greater than or equal to 70 points. * Subjects must have a history of a negative RPR and HIV. * Subjects must not have progressive cerebral disease or presence of other major medical illness * Subjects must not have exposure to known teratogens during pregnancy, except AEDs. * Subjects must not have poor compliance with prenatal care. * Subjects must have adequate reading skills to perform the cognitive tests.