It is advisable for men to take proper folic acid supplements when preparing for pregnancy because after sperm production, the spermatogenic epithelium produces primary spermatocytes and then needs to slow down the division to produce secondary spermatocytes, a process that requires the participation of pyrimidines and purines, and folic acid is needed in the synthesis of pyrimidines and purines, so folic acid plays an important role in the process of spermatogenesis. Folic acid deficiency can affect spermatogenesis and sperm production, so proper supplementation of folic acid has more benefits for men to improve their reproductive function. Folic acid is widely found in plant and animal foods, such as fish, seafood, meat, eggs, as well as spinach, oleaginous vegetables, lettuce, nuts contain a lot of folic acid. Men may choose not to take folic acid supplements if there is no deficiency in their organism, but in the case of folic acid deficiency, they should take appropriate folic acid supplements during pregnancy preparation, which can significantly improve reproductive function.