HCG high progesterone low is mostly seen in pregnant women, the common causes are ectopic pregnancy, luteal dysfunction, preeclampsia, etc. It is recommended to consult the doctor in time to find out the cause of the disease and take relevant measures. 1. Ectopic pregnancy: generally refers to ectopic pregnancy, refers to the development of the embryo in the uterine cavity outside the bed pregnancy, there can be HCG high progesterone low performance, at the same time there will be abdominal pain and vaginal bleeding symptoms, it is recommended that early treatment, so as not to cause life-threatening. 2. Luteal dysfunction: If the blood HCG is high and doubles every other day, the embryo is considered to be well developed, and at this time the progesterone value is low, it may be luteal dysfunction, you can supplement progesterone under the guidance of the doctor for fertility preservation treatment, pay attention to rest, avoid overwork, and re-examination to ensure that the fetus is well developed. 3. Pre-eclampsia: HCG is high, but the review is downward trend or doubled unsatisfactory, progesterone is also in the lower value, there may be pre-eclampsia, do not blindly preservation of the fetus, timely consultation and follow the doctor’s advice.