叶酸是本世纪后期被发现分离出来的 B族维生素之一 ,因从菠菜的叶子中提取而冠名。叶酸缺乏较早为人们所熟知的临床表现是贫血 ,由于怀孕后叶酸的需要量陡然剧增 ,故如果不注意及时补充 ,孕妇很容易发生叶酸缺乏性贫血 ,导致胎盘发育不良引起自发性流产。2 0世纪 80年代 ,各国 Folic acid is one of the B vitamins that have been found isolated late in the century because of the name extracted from the leaves of spinach. Folic acid deficiency earlier known as the clinical manifestations of anemia is due to the sharp increase in the demand for folic acid after pregnancy, so if you do not pay attention to timely replenishment, pregnant women prone to folate deficiency anemia, resulting in placental dysplasia caused by spontaneous abortion. 1980s, all countries