Obstetric performance of patients with my asthenia gravis.

Over a 10-year period, there were nine pregnancies in six myasthenic patients. In six of the nine pregnancies, there was an exacerbation of the disease, usually during the second trimester; in two pregnancies, drug requirements did not alter. One patient improved during pregnancy. Labor was efficient and uneventful, resulting in nine live babies, including one set of twins. Breastfeeding is not contra-indicated. The previously reported puerperal deterioration of myasthenia gravis is not a feature of this series.