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A patient was admitted to the hospital in the 31st week of gestation because of reduced sensation of fetal movements and a pathologic fetal heart rate tracing (Fig. 1). At first no underlying pathology could be found. After a week she developed a polyhydramnios. After repeated ultrasonographic examinations an atresia of the fetal small bowel was suspected (Fig. 2). The diagnosis could be confirmed after birth and on the same day the child was operated on. An atresia of the ileum was found. After liberal resection of the atretic part, recovery was complete. The malformation has an incidence of 1: 12,500-20,000. The etiology is thought to be a temporary or definite obstruction of a mesenterial artery branch, supplying the small bowel of the fetus. It develops after organogenesis and could be caused by kinking of an artery during rotation, an embolus, amniocentesis, volvulus, intussusception or snaring at the umbilical ring. Polyhydramnios is the first symptom in about one third of the cases. Diagnosis can be confirmed by fetography or ultrasonography. The latter is preferred because of its non-invasivity. In amniotic fluid, high levels of bile salts (up to thirty times the normal level) have been described in combination with atresia of the small bowel. A diminished disacharidase activity is also ascribed to it. Most of the time the diagnosis is suspected after birth on the basis symptoms such as a gastric aspirate of more than 25 cc, bile vomiting within a few hours, absence of meconium stool or distension of the abdomen. It can be confirmed by X-ray examination.(ABSTRACT TRUNCATED AT 250 WORDS)

Obstetrical and neonatological aspects of a child with atresia of the small bowel