Myasthenia gravis is characterised by muscle weakness and fatigability, par
ticularly of the facial and extremity muscles, deteriorating during the day
. During pregnancy, myasthenia gravis is rare and the course of illness is
unpredictable. The present case illustrates that first diagnosed during pre
gnancy, recurrent exacerbations can appear and lead to life-threatening sit
uations. Copyright (C) 2000 S. Karger AG. Basel.