Generally women can start getting pregnant after taking folic acid for 3 months, but the exact duration of the medication varies from person to person. Usually women should start supplementing folic acid in the first three months of preparing to get pregnant. Folic acid is an important nutrient for fetal growth, and timely supplementation can prevent fetal neurodevelopmental malformations, cleft lip and palate, and other conditions. If a woman is deficient in folic acid, she may need to take folic acid for longer than 3 months before she can start to get pregnant, depending on her condition. Women may experience adverse reactions such as nausea and bloating when taking folic acid. The drug is contraindicated in patients with folic acid intolerance. The drug should be banned when a change in the properties of the drug is detected during administration. The drug should be used under the guidance of a doctor and avoid unauthorized use of the drug to avoid adverse effects. If a woman takes folic acid, there are obvious symptoms of discomfort, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.