Leukorrhea is a vaginal secretion that provides vaginal lubrication and self-cleaning. The amount of leukorrhea increases when a woman is pregnant. Because of the increase in estrogen during pregnancy, cervical secretions and vaginal secretions increase, and the amount of leukorrhea may increase and become white and pasty. This phenomenon is more obvious in the first and last trimesters of pregnancy and is a normal physiological change during pregnancy. Pregnant women with leukorrhea can wash the vulva or take a bath every day to avoid secretions stimulating the vulva, but vaginal douching is strictly prohibited to avoid affecting the fetus. In addition, pregnant women should choose cotton, loose, breathable underwear, and often change, avoid chemical fiber underwear, so as not to cause local irritation. When a pregnant woman produces too much leukorrhea, she can use sanitary napkins and change them frequently to increase her comfort. If a pregnant woman has abnormal leukorrhea, local itching and other symptoms, she should go to the hospital for examination in time. In the late stage of pregnancy, if a mucus plug is discharged, it is usually a precursor to childbirth. However, if you find abnormal leukorrhea color and smell, such as yellowish leukorrhea and odor, you should consider vaginal inflammation, such as Pseudomonas aeruginosa, Trichomonas, Gonorrhea, Chlamydia and other infections, and you need to be treated in time.