The normal value of progesterone on day 46 of pregnancy is 80nmol/L, and the value of HCG is in the range of 15000-200000IU/L. If progesterone and HCG are low, it may be an aura of miscarriage, or it may be caused by ectopic pregnancy or fetal dysplasia, etc. It is better to conduct ultrasound to exclude ectopic pregnancy, and also to observe the fetal development. If it is an aura of miscarriage, it is best to treat it with progesterone under the guidance of the doctor; if ectopic pregnancy, it is best to operate in time, but abortion is recommended for fetal dysplasia to avoid affecting the baby’s development. It is better to have regular maternity checkups during pregnancy. Generally, fetal heartbeat and fetal bud can appear around 50 days of pregnancy, if there is no fetal heartbeat and fetal bud, embryonic abortion is considered and needs to be rechecked after 1 week. If there is still no heartbeat and germ, it is better to abort the baby in time to avoid prolonged stay in the uterus, which may cause bleeding and intrauterine infection, etc.