HCG is a very important hormone in the early stages of pregnancy, but not everything is fine if the blood HCG is high, but it also needs to be judged by the normal progesterone value in the body. In the early stage of pregnancy, both progesterone and HCG are very important hormones to ensure the healthy development of the fetus, among which whether the blood HCG can double in 48 hours interval is a very important indicator to determine whether the embryo is normal. There must be no problem with the development of the fetus. Therefore, in the early stage of pregnancy, we should combine progesterone and blood HCG to make a comprehensive judgment, and as long as both are within the normal range, we can ensure the healthy development of the fetus.