At this time there are no special reactions, for example, there is no nausea, vomiting and other related early pregnancy reactions. When the sperm and egg combination of 3 days, this is still the corresponding fertilized egg after the tubal survival of the state. At this time the fertilized egg in the fallopian tube gradually began to move to the uterine cavity, but has not yet been successful in the uterine cavity to bed, this time the fertilized egg and the uterine lining to have synchronized reaction. When the lining of the uterus has sufficient progesterone and other hormone levels reach an ideal state, 6-7 days after the formation of the fertilized egg, the fertilized egg will be successfully implanted in the lining of the uterus, and gradually form a gestational sac. About 2-3 days after the implantation, a significant change in the bleeding HCG value will be measured, and only after that will there be other corresponding reactions. Therefore, in the above case, there is no significant reaction.