During pregnancy, you can take simple folic acid tablets, or take Silien for pregnant women, or use multivitamin tablets, such as Elovate, which contains 0.8 mg of folic acid. simple folic acid tablets are cheaper and more effective in preventing fetal malformations. Folic acid should be taken during pregnancy until about the third trimester to reduce the rate of fetal malformations and prevent abnormal fetal neural tube development. Folic acid should be taken from the time of pregnancy preparation, and both spouses should take folic acid during pregnancy preparation. After pregnancy, pregnant women need to eat a moderate amount of fresh vegetables and fruits, which is also beneficial to supplement folic acid.