A lump of mucus like snot in late pregnancy may be a normal symptom, or it may be caused by gynecological disease or a precursor to labor. 1. Normal performance: in late pregnancy, the cervical opening expands and the cervical canal shortens, which will cause a mucous discharge in the vagina, similar to snot, which is a physiological manifestation and does not require special treatment. 2. Gynecological diseases: not paying attention to the hygiene of the lower body in late pregnancy may induce gynecological diseases, such as vaginitis, which will cause mucus like snot to flow out of the vagina, and may be accompanied by vaginal itching and other symptoms. 3. Aura of labor: in late pregnancy is already in the due date, the vagina outflow of mucus more, and also accompanied by regular contractions, may be the aura of labor, need to emergency medical treatment to wait for delivery. A lump of mucus like snot in late pregnancy and other abnormalities should be examined and treated to avoid adverse effects.