RESUMO
Twin pregnancies have a higher rate of premature delivery than singleton pregnancies and a substantially higher perinatal mortality. Twin gestation complicted by a single anomalous fetus diffculties in obstetric management. Options available to patients include continuing the entire pregnancy, selective termination of the anomalous fetus, or termination of the entire pregnancy. The incidence of one anomalous fetus in twin pregnancy is rare. Gastroschisis is intestinal herniation through a defect in the anterior abdominal wall usually to the right of umblicus. There is no sac and the intestines are covered with a thickened inflammatory exudate. Most case of gastroschisis occur sporadically and chromosomal anomaly are less common. A case of one gastroschisis in twin pregnancies diagnosed by ultrasonography is reported with a brief review of the literature.