Folic acid is a water-soluble vitamin, which can be derived from food or supplemented by medicine. Because folic acid is not heat-resistant, a large part of food will be lost after cooking, so the general food supplement effect is not as good as medicine. Doctors usually recommend folic acid supplementation in the first three months of pregnancy and the first three months of pregnancy. The main function of folic acid is to prevent fetal neural tube malformation. However, taking folic acid for pregnancy will not actually help to give birth to a boy, because giving birth to a boy actually depends on men. Human somatic cells have 46 chromosomes, of which 44 (22 pairs) are autosomes, and the other two play a decisive role in sexual development, called sex chromosomes. The two sex chromosomes of women are exactly the same in size and shape, which is called X chromosome. For men, one is the X chromosome, and the other is much smaller, called the Y chromosome. The most important significance of the Y chromosome is to determine the male sex. Taking folic acid will not have any effect on this chromosome, so taking folic acid will not increase the chances of having a boy.
In a word, taking folic acid three months before pregnancy is not helpful for giving birth to a boy, but in order to prepare a good environment in advance to give birth to a baby, because it is possible that when women think that they are pregnant, the baby is already growing quietly, and the first three months of pregnancy is the key period for the development of fetal neural tubes, so folic acid should be taken for prenatal and postnatal care.