In the early stages of pregnancy, the embryonic development is often judged by a combination of blood HCG and progesterone tests, because the fetal heart is not yet visible on ultrasound during this period. If you have a high blood HCG and low progesterone, you may have the following possibilities: 1. High blood HCG and doubling every other day is considered a good embryo development, but the progesterone value is not high at this time, it may be luteal malfunction, if the ultrasound examination has been determined to be intrauterine pregnancy, you can supplement progesterone under the guidance of the doctor, you can take it orally or inject it intramuscularly. If you can’t see the gestational sac, pay attention to rest, don’t exert yourself, recheck every few days, and don’t use medication first. 2. If the blood HCG is high but does not continue to double, progesterone is at a low value, and the gestational sac is not visible on ultrasound, or a mass is seen in the adnexal area, consider the possibility of ectopic pregnancy. This is a life-threatening condition that needs to be closely monitored and, if necessary, hospitalized for observation. 3. If the blood HCG is high and continues to drop on recheck, and the progesterone is also at a low value, it is considered to be pre-eclampsia or spontaneous miscarriage, so it is not recommended to blindly keep the pregnancy and let nature take its course. Don’t be nervous if the pregnancy test is abnormal, so as not to affect the development of the fertilized egg. Closely observe the changes of HCG and progesterone, and also assess the embryo survival by transvaginal ultrasound.