Second‐trimester intra‐abdominal bowel dilation in fetuses with gastroschisis predicts neonatal bowel atresia

Objective To determine in fetuses with gastroschisis the association between intra‐abdominal bowel dilation in the second trimester and neonatal bowel atresia. Methods We reviewed ultrasound and medical records of fetuses with gastroschisis from January 1998 to August 2004. Fetuses with intra‐abdominal bowel dilation in the second trimester were identified and followed into the neonatal period. Results We identified 58 mother‐infant pairs showing fetal gastroschisis, with at least one prenatal ultrasound at our hospital and which were delivered there, or were transported there as newborns. Forty‐eight of the 58 fetuses had no intra‐abdominal bowel dilation and none of these neonates had bowel atresia. Ten of the 58 fetuses had intra‐abdominal bowel dilation and all had bowel atresia at birth (P < 0.0001). In eight cases in which ultrasound was performed at < 25 weeks' gestation, intra‐abdominal bowel dilation was already present. Conclusion Intra‐abdominal bowel dilation in the second trimester predicts neonatal bowel atresia in fetuses with gastroschisis. Copyright © 2006 ISUOG. Published by John Wiley & Sons, Ltd.