Kingsleyan is a folic acid tablet, one tablet of about 0.4mg, which needs to be taken orally during the first 3 months of pregnancy preparation and 3 months of pregnancy to prevent fetal neural tube abnormalities. For the dose of oral folic acid, you can go to the hospital for a folic acid metabolism test. If the folic acid metabolism is abnormal, you need to take oral folic acid tablets for a long time until delivery, without any time limit. If the test result is normal, you can take 0.4mg once a day, and you should pay attention to balanced nutrition and eat more fruits and vegetables to ensure the stability and health of the fetus. It is important to pay attention in the second trimester and carry out all aspects of the check-up program to ensure that the fetus is normal.