贫血是妊娠期最常见的一种合并症。由于妊娠期间血容量增加,且血浆的增加多于红细胞的增加,致使血液稀释。所以孕妇贫血的诊断标准应相对降低,即红细胞计数<3.5×10~(12)/L或血红蛋白<100g/L,或红细胞压积<0.30。国内1998年统计资料表明,妊娠合并贫血的发生率为42.1%,以缺铁性贫血为主,巨幼红细胞性贫血较少见,再生障碍性贫血则更少见。妊娠4个月以后,铁的需要量逐渐增加,尤其是在妊娠后半期,如孕妇铁的摄取不足或吸收不良则容易发生缺铁性贫血。孕妇严重贫血,可引起胎儿发育迟缓、早产、死 Anemia is the most common form of pregnancy during pregnancy. Due to increased blood volume during pregnancy, and plasma increase more than red blood cells, resulting in hemodilution. Therefore, the diagnostic criteria of anemia in pregnant women should be relatively reduced, that is, red blood cell count <3.5 × 10 ~ (12) / L or hemoglobin <100g / L, or hematocrit <0.30. Statistics show that in 1998, the incidence of anemia in pregnancy was 42.1%, with iron-deficiency anemia mainly, megaloblastic anemia is rare, and aplastic anemia is even more rare. After 4 months of pregnancy, the demand for iron gradually increased, especially in the second trimester of pregnancy, such as iron deficiency or malabsorption of iron deficiency is prone to iron deficiency anemia. Severe anemia in pregnant women, can cause fetal retardation, premature delivery, death