Increased discharge at 39 weeks of pregnancy may be a precursor to labor, i.e., maturation and softening of the cervix in late pregnancy and the appearance of sticky discharge. In addition, vaginitis, cervicitis and premature rupture of fetal membranes can also occur. It is necessary to actively seek medical advice to clarify the causes and carry out reasonable treatment and handling. 1. Precursors to labor: Before delivery, pregnant women usually have increased discharge. Pay attention to vulvar cleanliness and it is recommended to wash the vulva with water twice a day, in addition to not having sex, which can easily stimulate induced contractions or vaginal inflammation. Pay attention to whether there is abdominal pain, vaginal bleeding or vaginal fluid symptoms, if these symptoms, go to the hospital in time for delivery; 2, vaginitis: in 39 weeks of pregnancy discharge increases, pay attention to the color and nature of the discharge, if you find that the discharge is yellow, green, accompanied by itching and other symptoms, suggest that there may be vaginitis, it is recommended that pregnant women do routine laboratory tests of the white belt, check mycoplasma, chlamydia and group B hemolytic streptococcus, these bacterial infections may cause vaginitis. All these bacterial infections may cause a significant increase in discharge and should be treated promptly with medication. The common medication for vaginitis is nifurtimox vaginal suppository. If the increase in discharge is accompanied by B group hemolytic streptococcal infection, it is recommended to treat with antibiotics to avoid intrauterine infection in the fetus; 3. cervicitis: pregnant women with cervicitis may have increased vaginal discharge accompanied by vulvar itching and discomfort. Sudden vaginal discharge and an increase in self-conscious discharge are suspected to be premature rupture of fetal membranes, and once there is premature rupture of fetal membranes, she needs to go to the hospital immediately.