A case of polyradiculoneuritis, resembling Guillain-Barre syndrome, was reported during the sixth month of a first gestation. The patient was seventeen years old and also had toxaemia of pregnancy. The interaction between polyradiculoneuritis and pregnancy is slight and carries little risk of prematurity. Plasma exchange procedures can be used in pregnant women and the results of this treatment are similar to those in patients presenting with polyradiculoneuritis alone.