Umbilical Doppler	Group						X² P
Umbilical Doppler	Severe		Moderate		Mild		X² P
Abnormal	3	27.3%	1	4.3%	0	0.0%	12.623 0.002*
Normal	8	72.7%	22	95.7%	40	100.0%	12.623 0.002*
Total	11	100.0%	23	100.0%	40	100.0%