The price of a bottle of folic acid will cost about$20-100, and varies from place to place, so please take into account the local rates. Folic acid is mainly used to prevent the birth of children with menstrual defects. In general, couples with fertility requirements are advised to take folic acid orally to supplement folic acid in the first trimester of pregnancy and to take folic acid until the third trimester of pregnancy before stopping folic acid. In cases where the patient does not know when to get pregnant, it is recommended to take folic acid as soon as possible after pregnancy is detected to prevent the birth of children with neural tube defects. Folic acid, in general, one tablet a day is sufficient. Folic acid, for men, is also recommended to be taken orally to prevent neural tube defects if they are not pregnant before.