When the fertilized egg is just implanted, the vaginal secretion will not change accordingly, only after the implantation as the trophoblast cells begin to secrete blood HCG, causing the body’s estrogen and progesterone to rise continuously, when it rises to a certain level will cause the vaginal secretion to increase. This increase in vaginal discharge is only an increase in the amount of vaginal discharge, there will be no corresponding change in the nature of the change in color will not occur, or milky white, there is no foreign body or only a faint fishy smell. It is recommended to keep the vulva locally clean during pregnancy, wash the vulva 1-2 times a day, and change underwear frequently, washed underwear must be dried under the sun, which will play the role of sterilization and disinfection, which reduces the possibility of infection of the reproductive tract.