The present study indicates that duodenal obstruction is a more serious condition than previously believed, with an increased risk of prenatal asphyxia and death, even when the karyotype is normal and no associated anomalies are present. We consider the possibility that it could be caused by bradycardia/asystole following vagal overactivity due to distension of the upper gastrointestinal tract.

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showed no hydronephrosis, 61 with mild hydronephrosis and 52 with severe hydronephrosis at 37-40 gestational weeks; In the severe group, 12 showed no hydronephrosis, 3 with mild hydronephrosis and 30 with severe hydronephrosis (χ 2 = 24.25, P = 0.00). (4) 146 kidneys of 223 still had hydronephrosis at 37-40 gestational weeks but 15 of the 146 kidneys had no hydrophosnis at 18-24 gestational weeks. Conclusions: Targeted ultrasound at 29-32 gestational weeks was useful in the detection, dynamic observation and follow-up of fetal renal pelvis dilatation, and is valuable in early detection and perinatal management of hydronephrosis. VP11.02 Ultrasound diagnosis of abnormal external genitalia of fetus

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