A.There is a threefold increase in perinatal mortality, a twofold increase in abruptio placentae, and an increased rate of impaired fetal growth in pregnant women with preexisting hypertension.

• 先前就存在高血压的孕妇围产期死亡率增加三倍，胎盘早剥增加两倍，胎儿生长受损的比例增加。