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目前怀孕妇女服用叶酸补充剂以降低神经管缺陷风险已达共识。美国和挪威的研究人员对1 499例妊娠妇女和她们的孩子(6岁时)进行调查研究。大约一半的妇女在受孕前1个月服用叶酸补充剂,近90%的人在怀孕的第3个月服用该药。但很少有人服用叶酸的剂量超过每日80mcg。结果发现,尽管首次或第2次怀孕的妇女较先前多
At present, pregnant women taking folic acid supplements to reduce the risk of neural tube defects has reached a consensus. Researchers from the United States and Norway conducted a survey of 1,499 pregnant women and their children (at 6 years of age). About half of women take folic acid supplements one month before conception and nearly 90% take the drug during the third trimester of pregnancy. Few people, however, take folic acid at doses over 80 meg. The results showed that although the first or second pregnant women more than before