The nature of the leucorrhoea does not change after the fertilized egg is deposited, it is still relatively thin and milky white, with no odor or only a faint fishy smell, but only an increase in the amount of the leucorrhoea. Because the trophoblast cells begin to secrete blood HCG after the fertilized egg is deposited, the estrogen in the body begins to increase, and progesterone also begins to increase, the cervix and vaginal secretions will appear to increase significantly. It is recommended to keep the vulva locally clean after pregnancy, wash the vulva every day and change the underwear frequently to reduce the possibility of local infection. If there is an increase in the amount of discharge after the fertilized egg is deposited, if the discharge is yellowish in color, if there is a noticeable odor, or if there is itching of the vulva, it is advisable to go to the hospital for examination, because this is an abnormal phenomenon.