Early pregnancy mainly refers to the first trimester of pregnancy, during which increased leucorrhea can be normal. However, if itching and odor occur, you should seek medical attention to check the vaginal discharge in time to prevent vaginal infections that may affect the growth and development of the fetus. After pregnancy, the corpus luteum of the ovaries and the placenta formed after 12 weeks of pregnancy secrete large amounts of estrogen and progesterone to facilitate the fertilized egg’s implantation and development. The estrogen of pregnant women will also increase with the increase of fetal months to promote the secretion of mucus from the uterus and endometrial glands, which can cause an increase in tissue fluid in the cervix and vagina, resulting in increased leucorrhea. The leukorrhea is mostly white or yellowish and has no odor. Usually pregnant women need to pay attention to keep their pubic area clean and dry, wash their vulva as often as possible to avoid bacterial infection, and pay attention to a light diet, avoiding greasy and spicy food as much as possible. However, pregnant women should be alert to yellow vaginal discharge with odor and itching. If this symptom occurs, they should go to the hospital to find out the cause of the abnormal vaginal discharge. If it is caused by bacteria, trichomonas or other infections, it should be treated with appropriate medication under the guidance of a medical professional and avoid unauthorized use of medication.