母亲的血浆容量在妊娠中、晚期进行性增加,其程度与胚胎大小有关,多胎妊娠增加最多,婴儿过小者增加最少。子痫前期妇女血浆容量减少,是损害胎儿生长最常见的原因。慢性高血压孕妇也有血浆容量减少,因此,血压升高可直接减少血浆容量。子痫前期的妇女血管内白蛋白总量减低,但血管外白蛋白无改变;白蛋白在血管内外两部分交换 Mother’s plasma volume during pregnancy, advanced progressive increase in the extent and size of the embryo, multiple pregnancies increased most, infants who increased at least. Reduced plasma volume in women with preeclampsia is the most common cause of impaired fetal growth. Chronic hypertension pregnant women also have reduced plasma volume, therefore, elevated blood pressure can directly reduce the plasma volume. The total amount of albumin in women with preeclampsia decreased, but the extravascular albumin did not change; albumin was exchanged in the two parts of the blood vessel