If you are not pregnant after three months of folic acid, you can continue to take it. Folic acid does not affect your body and can correct folic acid deficiency. The main purpose of taking folic acid is to prevent fetal neural tube abnormalities and to reduce the number of children born with anencephaly and spina bifida, so you can continue to take it. It is recommended to have intercourse when planning to get pregnant to calculate the time of ovulation, then project the ovulation period according to the time of ovulation, and arrange sex reasonably during the ovulation period, so as to improve the chances of pregnancy. If you are not pregnant after six months of reasonably arranged sex during ovulation, it is best for the male partner to have a routine semen test to find out if the semen abnormality is causing infertility, and it is also recommended for the female partner to find out if there is ovulation and, if necessary, to have an immunological infertility test.