Background Introduction Leucorrhea is the product of self-cleaning of women\’s private parts. It has the function of protecting the vagina and preventing bacterial infection. Throughout a woman\’s life, the amount and nature of leucorrhea will change with factors such as age, season, and menstrual cycle. Some women will find that the leucorrhea disappears after implantation. Is this normal? This article will answer this question from many aspects. Changes in hormone levels during pregnancy. In the early stages of pregnancy, the level of progesterone in a woman’s body will increase significantly, and progesterone is a hormone that can inhibit the secretion of estrogen from the ovary.