The cervical mucus plug is usually discharged in about 48 hours when contractions start, and the baby may be born in two to four days, usually no later than seven days. After the contractions start, the baby may be born in about 10 to 24 hours. A cervical mucus plug is a protective, clear, colorless mucus that blocks bacteria from entering the cervix and protects the fetus from bacterial infection. The discharge of the cervical mucus plug indicates that the fetus has moved down and the cervical opening is slowly opening. Before full-term labor, not only can the cervical mucus plug be discharged, but it may also be accompanied by bloody leukorrhea, which is a prenatal symptom due to the fetus moving down, the microvascular rupture and leukorrhea mixed with discharged, are all prenatal symptoms. These symptoms mostly occur about 48 hours before labor. So usually when this happens, labor is possible in about 2 to 4 days. After the discharge of the cervical mucus plug, as long as there are regular symptoms of paroxysmal abdominal pain, or rupture of the amniotic fluid, you need to go to the hospital immediately, hospitalized in the hospital, under the supervision of the doctor to wait for delivery.