The reference value of HCG on day 37 of pregnancy is 10000-180000 IU/L and the reference value of progesterone is 25ng/L or more. Since the HCG level in pregnant women varies greatly among individuals, even in the same pregnancy week, it cannot be judged by only one value, but usually the embryo development is judged by rechecking HCG every other day and observing the doubling of HCG. If the HCG doubles well and the progesterone is normal at 37 days of pregnancy, it means that the embryo is developing normally and there is no need to worry too much, but we need to confirm whether it is intrauterine pregnancy by ultrasound examination at about 50 days of pregnancy. If the HCG value is low, or if the doubling is not good and the progesterone is low, you should be alert to the possibility of ectopic pregnancy, and the pregnant woman is advised to review the ultrasound for a clear diagnosis. If the HCG doubling is normal but the value is low, along with a low progesterone value, it may be due to embryonic dysplasia. It is recommended to rule out the presence of anemia, gestational diabetes, or abnormal thyroid function during pregnancy, as these factors can affect embryonic development. If they exist, targeted treatment should be given, for example, anemia can be treated with iron under the guidance of the doctor and attention should be paid to strengthening nutrition. In case of gestational diabetes, the pregnant woman’s blood sugar needs to be controlled.