The normal discharge of leukorrhea to the vulva after the fertilization of the egg is colorless, transparent, odorless and sticky. The sticky leukorrhea is mainly caused by the increase in progesterone secreted by the ovaries after the fertilized egg is deposited, which is conducive to preventing the bacteria in the vagina from infecting the uterine cavity, or else it will affect the embryo’s growth and development, resulting in miscarriage with precursor or difficult to avoid miscarriage. After the fertilized egg implantation, due to the increased secretion of leukorrhea, the vulva should pay attention to cleanliness and hygiene, you can use warm boiled water to wash the vulva, do not use lotion to sterilize the treatment, and do not eat cold and spicy stimulating food. When the fertilized egg is deposited in the uterine cavity, blood should be drawn to test the level of human chorionic gonadotropin in the blood, to observe the early development of the embryo whether it is consistent with the gestational week.