The range of HCG value for biochemical pregnancy is usually less than 200 IU/L. It is better to go to the hospital to have a blood test for HCG in blood to see. If a biochemical pregnancy occurs, it may be caused by a poorly developed gestational sac, or chromosomal abnormalities or environmental factors, which generally have little effect. It is best to have regular medical checkups during the next pregnancy preparation period, pay attention not to eat spicy and stimulating food, it is best to eat more lean meat and eggs, it is also recommended not to smoke, drink alcohol and take drugs indiscriminately, it is best to exercise properly during the pregnancy preparation period to enhance the resistance and help the baby develop after pregnancy. The best early pregnancy bed rest, do not contact with radiation, the best attention to sleep enough, pay attention to eat more fresh vegetables, fruits, can reasonably supplement vitamins.