Vaginal discharge, or leukorrhea, is composed of fluid secreted from the cervix and vagina, epithelial cells shed from the vagina, and normal flora in the vagina. After pregnancy, due to the increase of estrogen level in the body and rich blood flow in the vagina, leukorrhea increases than before, usually milky white, which is a normal physiological phenomenon. This is a normal physiological phenomenon. There will be more leucorrhea near the delivery period. In late pregnancy, the cervical canal starts to become shorter and dilated, and the mucus plug inside the cervix will be discharged, and there will be a discharge like egg white, sometimes with some blood. If the amount of leucorrhea is small and there are no other accompanying symptoms, such as itching, pain and burning sensation in the vulva, it is also normal during pregnancy; if the amount is large and there are other accompanying symptoms, you need to be alert to the combination of vaginal inflammation, and further consultation and treatment should be carried out. If there is a sudden increase in leucorrhea with a change in nature, or if there is painful urination, painful intercourse, painful vulva, itching, burning sensation, flushing or even swelling of vulva, etc., it is abnormal and you should be alert to the possibility of combined vaginal inflammation. As mentioned above, it is normal to have increased leucorrhea during pregnancy, which is milky white, and a few of them are light yellow, without any discomfort symptoms. However, if the leucorrhea is yellowish or accompanied by other symptoms such as itching, pain and burning sensation in the vulva, it may be combined with vaginal inflammation and the cause should be identified promptly.