Pregnancy 40 weeks + 3 days, pregnant women belly tight, brown discharge, may be the first sign of labor, placental abruption and other causes. 1. Aura of imminent labor: 40+3 weeks of pregnancy when the fetus has exceeded the due date, and at this time the fetus has matured. When the belly is tight and there is a small amount of brown vaginal discharge, it is a sign of preterm labor, ultrasound and fetal heart rate monitoring are normal, but also vaginal examination to understand the degree of cervical ripeness, and comply with the doctor’s instructions to hospitalization in due course to wait for delivery. 2. Placental abruption: it will also be manifested as tightness of the belly, there is no obvious contraction interval on palpation, accompanied by a small amount of vaginal bleeding, and the fetal heart rate slows down or disappears on auscultation, combined with ultrasonography, fetal heart rate monitoring, and laboratory tests can be a clear diagnosis, and the pregnancy should be terminated as soon as possible. Pregnancy forty weeks + 3 days, pregnant women belly tightness, brown discharge when you need to go to the hospital in a timely manner, by the doctor a clear diagnosis, and cooperate with the doctor symptomatic treatment.