The study authors note that although these data support the use of continued antiepileptic drug treatment in pregnant women with epilepsy, high doses of antiepileptic drugs may increase the risk of spontaneous abortion, especially when using high doses of valproate, clonazepam, and carbamazepine.A related editorial states that although these findings are reassuring, studying the use of drugs in pregnancy is challenging and no confident conclusions can be made regarding safety.