贫血是妊娠期常见的合併症之一,对孕妇及胎儿的生长发育均有一定的影响。最常见的贫血是缺铁性贫血,约占百分之九十以上。正常妇女的红细胞为每立方毫米五百五十万至四百五十万之间,血红蛋白每一百毫升血内含十三点五克至十一克。如果红细胞数在三百五十万以下,血红蛋白低于十克,就称为贫血。妊娠期贫血可有以下几方面原因:一、妊娠前就已经有贫血,妊娠后贫血程度加重。二、妊娠自两个半月开始,血溶量迅速增加,五个月以后增加速度缓 Anemia is one of the common comorbidities during pregnancy, and has some impact on the growth and development of pregnant women and fetuses. The most common anemia is iron deficiency anemia, accounting for more than 90%. Normal women’s red blood cells range from 5.5 to 4.5 million cubic centimeters, blood hemoglobin per hundred milliliters of blood contains 13.5 to 11 grams. If the number of red blood cells below 3.5 million, hemoglobin less than ten grams, it is called anemia. Anemia during pregnancy can have the following reasons: First, there has been anemia before pregnancy, anemia after pregnancy increased. Second, pregnancy since two and a half months, the rapid increase in blood volume, increase in speed after five months