Preparing for pregnancy can take folic acid. Folic acid belongs to the vitamin class of drugs, during the preparation for pregnancy, women take folic acid reasonably, can effectively prevent the occurrence of neural tube malformation condition of the fetus, can also prevent pregnant women from developing megaloblastic anemia. If a woman takes a large amount of folic acid for a long period of time, she may experience gastrointestinal adverse reactions such as bloating, nausea, and fear of food. When taking folic acid, yellowish color of urine may occur. If a woman develops megaloblastic anemia caused by vitamin B12 deficiency during preparation for pregnancy, she should take folic acid and vitamin B12 at the same time for treatment, and not use folic acid alone for treatment. During preparation for pregnancy, women need to supplement folic acid in moderation, which is beneficial to the health of mother and child, and should take folic acid under the guidance of medical professionals.