Cunningham MC et al. Final results from 18 years of the Lamotrigine Pregnancy Registry. Neurology 2011; 76: 1817-1823.
1558 first trimester exposures occurred. There were 35 infants (2.2 %) with major congenital malformations. This is similar to population based cohorts. However, the number was 10.7%ammmong the 150 exposed both to lamotrigine and valproate in the first trimester and 2.8 % in 430 patients exposed to lamotrigine polytherapy without valproate. Among patients with first trimester monopharmacy with lamotrigine, there were 3 cases of anencephaly, all of which were electively terminated.
1558 first trimester exposures occurred. There were 35 infants (2.2 %) with major congenital malformations. This is similar to population based cohorts. However, the number was 10.7%ammmong the 150 exposed both to lamotrigine and valproate in the first trimester and 2.8 % in 430 patients exposed to lamotrigine polytherapy without valproate. Among patients with first trimester monopharmacy with lamotrigine, there were 3 cases of anencephaly, all of which were electively terminated.