Low HCG in early pregnancy may be caused by luteal insufficiency, low quality of embryo or ectopic pregnancy, etc. It can be treated by paying attention to rest, supplementing sufficient nutrients, using medication and surgery. 1. Luteal insufficiency: low HCG in early pregnancy may be caused by luteal insufficiency, pregnant women need to pay attention to proper rest, use progesterone injection, dydrogesterone and other treatments. 2. Low quality of embryo: low quality of embryo may also cause low HCG value, pregnant women need to do on-time maternity checkups, if it is determined that the embryo has stopped and other abnormalities, you need to terminate the pregnancy in a timely manner, such as surgery. 3. Ectopic pregnancy: Ectopic pregnancy may also be caused by the embryo not implanted in the uterus, but in other parts of the bed, commonly fallopian tube, resulting in low HCG values, the patient needs to terminate the pregnancy through timely surgery or drugs (methotrexate). It is recommended that once a pregnant woman discovers that she has a low HCG value in the early stages of pregnancy, she should consult a doctor in time to complete the relevant examinations and standardize the treatment. In addition, drugs may cause certain side effects, should be used under the guidance of a doctor, do not blindly use drugs.