Bariatric surgery is currently considered as an alternative for the treatment of morbid obesity refractory to conventional clinical treatments. The surgeries more frequently used, which are radical and invasive, yield better and faster results, but are subject to clinical and surgical complications such as intestinal obstructions and subocclusions. Pregnancies in women submitted to this type of surgery are increasingly frequent, and the related complications have been increasingly reported. We present the case of a pregnant woman previously submitted to bariatric surgery who developed subocclusion with intestinal intussusception. This extremely serious complication requires attention for its diagnosis, i.e., imaging and laboratory exams that are not usually employed during pregnancy. Gestation confuses and impairs their interpretation. In addition to the fact that the only treatment that reaches a good result is invasive, exploratory laparotomy is undesirable during this period. Maternal, fetal and perinatal mortality is usually high. In the present case, delivery occurred spontaneously during the first hours of hospitalization before the surgical procedure. Evolution was good and both mother and newborn, although premature, had good course and were discharged in good conditions.3210516519(1991) NIH Consensus Statement, 9 (1), pp. 1-20. , Gastrointestinal surgery for severe obesitySegal, A., Fandiño, J., Indicações e contra-indicações para realização das operações bariátricas (2002) Rev Bras Psiquiatr, 24 (SUPPL. 3), pp. 68-72(2007), National Center for Health Statistics, Centers for Disease Control and Prevention. Health, United States, 2006. Hyattsville: CDC(2006) Hospital De Clínicas Atinge a Marca De 500 Cirurgias Bariátricas, , http://www.hc.unicamp.br/imprensa/not-060925-bariatrica.shtml/, Assessoria de Imprensa do HC Unicamp [Internet], [citado 2010 Fev 14]. 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