In clinical practice, the reference value of progesterone in different units at 8 weeks of pregnancy is 28.6±7.98ng/mL or 89.2±24.6nmol/L, and the reference value of human chorionic gonadotropin (HCG) is 15000-200000IU/L. Pregnant women can refer and compare their progesterone and HCG test results to see if they are within the test range and compare them with their last test The results should be compared with the previous test. The progesterone test at 8 weeks of pregnancy is mainly used to determine the growth and development of the fetus based on the gestational sac, fetal heartbeat and fetal bud, and to exclude the risk of ectopic pregnancy and embryonic arrest, etc. HCG and progesterone work in synergy to provide nutrients to the embryo and to protect the embryo safely. Progesterone testing during pregnancy can reflect the function of the placenta more visually. If progesterone continues to decrease during pregnancy, it may be a sign of preterm miscarriage, but it also varies from person to person. The HCG test during pregnancy is to observe the embryonic growth and development. The way of HCG growth in early pregnancy is a steady doubling growth in 1-2 days interval, if the doubling of HCG during pregnancy is poor or below the normal value for a long time, it may suggest the occurrence of preterm miscarriage, ectopic pregnancy, embryonic development delay, etc. However, it should be clear that when HCG and progesterone values are low, miscarriage, ectopic pregnancy, etc. are also only more likely to occur, not necessarily.