Fetal small bowel obstruction: report of two cases.

Fetal small bowel obstruction is usually diagnosed by sonography in the late second or early third trimester. We report two such cases of different etiology: a case of meconium ileus due to cystic fibrosis and a case of intestinal atresia. The only sonographic finding that allowed differentiation between them was the echogenic bowel in the case of cystic fibrosis.