The normal range for homocysteine is 5 to 15 μmol/L, so the current test result of 12.5 μmol/L is within the normal range and does not affect pregnancy. Homocysteine is due to the conversion of the important amino acid methionine in the body. A low homocysteine level generally has a low impact, and more attention needs to be paid to an elevated level of this indicator in the clinical setting. So keeping homocysteine within the normal range is very important for the health of the body. In order to ensure that homocysteine is within the normal range, usually pay attention to low-salt, low-fat diet, and eat more fresh fruits and vegetables as appropriate. In addition, those who have been preparing for pregnancy for a long time without success should go to the gynecology department of the hospital in time for further examination to clarify whether there are factors affecting pregnancy. After identifying the causes, treatment should be carried out under the guidance of doctors.