[16] who examined the effect of colour Doppler on the amniotic fluid index measurements, stated that amniotic fluid index measured by Doppler increases false-positive diagnosis of oligohydramnios and also may underestimate polyhydramnios. In a recent study by Odibo et al.
Congenital high airway obstruction syndrome is characterised by a dilated trachea, hyperechoic lungs, fattened diaphragm, foetal ascites and polyhydramnios on the antenatal care scan (1).
Polyhydramnios was present in 25% of all pregnancies and turned out to be more common in pregnancies with boys (40%) than girls (10%) with EA (p < 0.01).
Typically, the diagnosis is made by prenatal ultrasound with a history of polyhydramnios (32% to 81%) and the detection of two fluid-filled structures consistent with a "double bubble" (the stomach and the dilated proximal duodenum), in up to 44% of case.