Research into psychiatric illnesses during pregnancy and the postpartum period has focused primarily on mood disorders and psychosis. However, recent reports suggest that during pregnancy and the postpartum period psychiatric patients run an increased risk of developing the symptoms of obsessive compulsive disorder (OCD) or if they already have these symptoms, the severity is likely to increase. We report two cases of OCD in pregnancy and in the postpartum period. In addition, we present a brief review of the literature that is currently available on this topic.