Pregnancy by the placental secretion of estrogen and progesterone, the vaginal mucosa has congestion, edema phenomenon, the appearance of purple-blue, the vaginal folds increased, soft and flexible, the surface area increases, at this time, the vaginal mucosa permeability increases, ooze than non-pregnancy increased significantly, while the cervical canal of the glands to increase the secretion of the cervical canal, so the obvious changes in the leukorrhea in the early stages of pregnancy is reflected in the increase in the amount of the leukorrhea. However, each person’s situation is different, and some people may also have a decrease in the amount of leukorrhea. After pregnancy, the vaginal mucosa becomes congested and edematous, and the exudate increases significantly compared to non-pregnancy. Vaginal secretions will increase and may be thicker due to a number of factors such as estrogen and progesterone levels, increased vaginal exfoliated cells and secretions, increased permeability of the mucous membranes, and increased secretion from the cervical canal glands. Usually, leukorrhea that is clear and watery, occasionally light yellow and without odor is normal. However, if during pregnancy, there is a constant increase in leukorrhea, accompanied by a very special smell and color, vulvar itching, or early pregnancy leukorrhea with blood, etc., then you need to go to the hospital in time to do leukorrhea and gynecological routine and other tests, timely and clear causes and targeted treatment.