If a woman has a biochemical pregnancy, the indicator of HCG is around 50-200 U/L, while the indicator of progesterone is usually lower, mostly below 10 ng/L. Because a biochemical pregnancy is one in which the fertilized egg does not successfully settle and grow and is expelled from the uterine cavity, the HCG hormone produced by the trophoblast cells will not be very high, and it is unlikely that it will double every other day. Also after the fertilized egg is expelled from the uterine cavity, the hormone levels in the body drop rapidly and this is what causes the molting tissue of the uterus to peel off, leading to the obvious manifestation of vaginal bleeding. Since the fertilized egg flows out of the uterine cavity naturally without damaging the endometrium, it has no adverse effects on the woman’s body and can therefore be treated as if she were having her period, without the need for postpartum medication or menstruation, and she can have normal intercourse to prepare for pregnancy in the month of the biochemical pregnancy.