If the leucorrhea appears yellowish-green during pregnancy, it indicates inflammation of the vagina, and if it is not controlled in time, it may cause retrograde infection, which may lead to infection in the uterine cavity and may cause the fetus to stop developing, so it still has a very big impact. It is advisable to go to the hospital for a laboratory test of the discharge to find out which kind of pathogenic infection is causing the vaginal inflammation, and then to give targeted medication to confine the inflammation to the vagina so that it will not cause retrograde infection. It is also recommended to keep the vulva clean, wash it with warm water 1-2 times a day and change the underwear regularly.