The mid-pregnancy homocysteine range is generally around 5 to 15 micromoles per liter. Homocysteine is an amino acid found in plasma and is generally present in very small amounts in all cells of the body because the body can rapidly convert homocysteine into other products. The mid-pregnancy homocysteine range is generally around 5 to 15 micromoles per liter, and ideally should be less than 10 micromoles per liter. If homocysteine is abnormal, it may be due to insufficient intake of vitamins such as folic acid, vitamin B, and niacin in daily life, as well as excessive alcohol consumption, kidney disease, hypothyroidism, and homocystinuria. Patients with elevated homocysteine values in mid-pregnancy should beware of the risk of thrombosis, and are advised to go to the hospital in time for targeted treatment under the guidance of specialized doctors.