On the 15th day of pregnancy, that is, 15 days after fertilization, the HCG value is above 1000IU/L. Some women may have HCG level slightly lower than this level due to the late implantation of the fertilized egg or the slow development of the fertilized egg, as long as there is no lower abdominal pain or vaginal bleeding, you can observe for the time being, and then recheck the elevated HCG level again after 7 days. In early pregnancy, as the number of days of pregnancy grows, HCG level is doubled every other day and the level of progesterone will also increase, you can do gynecological ultrasound in about 40 days of pregnancy, checking the uterine cavity has a complete growth of the gestational sac, and fetal heartbeat is good, the diagnosis is normal intrauterine pregnancy. After pregnancy, you should pay attention to maintain a regular life, appropriate rest, avoid adverse stimuli, to ensure the growth and development of the embryo.