In the early stage of pregnancy, due to the thousands of times increase of estrogen in the body, the vaginal discharge and cervical canal secretion will increase, which is clinically manifested as increased leucorrhea. However, the leukorrhea is milky white, with a faint fishy smell, no odor, and does not cause vulvar itching, which is a normal physiological phenomenon. However, if the leucorrhea is yellowish in color and has a bad odor, and if it is itchy or painful, it is an abnormality and needs to be checked and treated according to the pathogenic bacteria. In addition, in the early stages of pregnancy, the leucorrhea increases, it is important to keep the vulva clean, wash it with water twice a day, and it is recommended to change underwear regularly.