一般情况下，正常女性每天至少需要400微克的叶酸，可以通过饮食或服用叶酸片来满足。
Under normal circumstances, the normal women need at least 400 micrograms of folic acid, folic acid through diet or tablets to meet.
当你准备要一个孩子的时候，你要开始做产前检查，每天服用至少含有400微克叶酸的多维他命剂。
Start taking a prenatal or multivitamin containing at least 400 MCG of folic acid per day as soon as you know you're ready for babies.
尤其在骨髓初期开始成长的时候，当然那时孕妇可能还不知道自己怀孕了，最安全的办法就是让她每天服用400微克的维生素b(叶酸的合成体)。
Since the spinal cord starts to develop extremely early-before a woman may know she's pregnant-the safest course is for her to take 400 micrograms of folic acid (the synthetic form of folate) daily.
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