Objectives To summarize the influence of abnormal S/D ratio for fetus and infants in the cases of intrauterine growth retardation(IUGR),hypertension of pregnancy,umbilical twine and cholestasis.

• 目的总结胎儿脐血流S/D值异常在胎儿宫内发育迟缓、妊高征、脐带缠绕、胆汁瘀积症等病理情况时胎儿及新生儿的结局。