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一、妊娠期的血液学生理变化在妊娠期间,由于血浆容量的增加早于并超过了红细胞容量的增加,因此,妊娠期的血液出现了一定的稀释现象。此现象在妊娠的第3个月开始出现,在第5～8个月时较明显,以后逐渐减轻。此现象虽使血液的粘稠度降低,减少了血栓形成的可能,但却使红细胞的压积减少,被称为妊娠期的生理性“贫血”,其血红蛋白测定值仍在10g/d1以上。妊娠期间,少数孕妇的白细胞计数轻度增高,外周血中可见中幼与晚幼粒细胞。随着逐渐接近分娩,中性粒细胞百分数逐渐增高,分娩时白细胞计数可有明显增加,最高可达34×10~9/1。
First, the gestational hematology physiological changes during pregnancy, due to an increase in plasma volume earlier than and beyond the increase in erythrocyte volume, therefore, the pregnancy blood appeared a certain dilution. This phenomenon began in the third month of pregnancy, more obvious in the first 5 to 8 months, then gradually reduced. Although this phenomenon reduces the viscosity of the blood, reducing the possibility of thrombosis, but decreased hematocrit, known as physiological pregnancy anemia, the measured value of hemoglobin is still above 10g / d1. During pregnancy, a small number of pregnant women slightly increased white blood cell count, visible in the peripheral blood of young and late promyelocytic. With the gradual close to childbirth, the percentage of neutrophils increased gradually, and the number of leucocytes during labor increased significantly, up to 34 × 10 ~ 9/1.