What is the dosage of folic acid tablets in early pregnancy, 0.4mg or 5mg?

Patient's question:

No

Doctor's answer:

Hello, according to what you said, it should be 5 mg daily, once a day. Supplement 5 mg of folic acid daily for the first three months of pregnancy and the last three months of pregnancy, which can prevent neural tube and vascular malformations of the fetus.