It is not normal for a woman to have elevated HCG and decreased progesterone in the early stages of pregnancy. A progesterone level below 15 IU/L can easily lead to lower abdominal pain, a small amount of vaginal bleeding, and other cases of preterm miscarriage. If the progesterone is only mildly reduced, the progesterone level will increase through bed rest and progesterone-based medication. After the progesterone is elevated and the HCG is elevated, the gynecologic ultrasound shows that the gestational sac is in line with the gestational week and that the fetal heartbeat is present to prove a normal intrauterine pregnancy. In the early stages of pregnancy, the growth and development of the embryo in the uterine cavity is initially determined by the blood HCG, progesterone and gynecological ultrasound, if any of them is abnormal, the development of the embryo will be adversely affected and needs to be treated in time.