Under normal circumstances, HCG will not rise again after it drops. HCG, also known as chorionic gonadotropin, is a hormone secreted by the trophoblast cells of the placenta after pregnancy. It is a hormone secreted by the trophoblast cells of the placenta after pregnancy. As the child grows larger, it will slowly rise in the woman’s body, so you can check the rate of HCG rise in the early stage of pregnancy to determine whether the fetus is developing normally. If there is a drop in HCG in early pregnancy, it generally means that the embryo has stopped developing or the child has been miscarried, so you should go to the hospital as soon as possible for an ultrasound to see if the embryo is already bad, so there is no possibility of it rising if you continue to wait. If there is an embryo inside the uterine cavity on ultrasound, terminate the pregnancy as soon as possible.