The children whose mothers were given valproate during pregnancy were seven times more likely to develop autism compared to children whose mothers did not take an epilepsy drug while pregnant.

• 妊娠期间服用了丙戊酸盐类药物的母亲所生的孩子发展为孤独症的可能是妊娠期间未服用丙戊酸盐类药物的母亲所生的孩子的七倍。