Does folic acid have side effects on pregnant women?

Folic acid is a water-soluble vitamin, he is all the vitamins necessary to generate new cells, conducive to nucleic acid synthesis, after pregnancy, because fetal embryos, processing needs a large number of new cells generated, therefore, need a lot of folic acid, then in order to prevent fetal neural tube defects, it is generally recommended that routine oral folic acid treatment, because folic acid is a water-soluble vitamin, if the dosage is slightly more, more than physiological needs, generally excreted with urine, There are no obvious side effects, but high intake over time may affect the absorption of other nutrients such as zinc,