Normally, a brown discharge in late pregnancy is born within 24 to 48 hours. However, due to individual differences, there are some pregnant women who give birth a few days or even a week or so after the appearance of brown discharge. Brown discharge in late pregnancy is usually suggestive of red, is due to the fetal head down into the basin, the fetal membranes and the uterine wall gradually separated, caused by blood vessel rupture bleeding caused by the vagina of pregnant women at this time will appear pink or brown viscous liquid. Usually, labor pains occur within 24 to 48 hours after the onset of redness, followed by labor. However, due to the individual differences between pregnant women, so in the end how long it will be born can not be generalized, the routine situation if the red, ready to wait for the birth can be. However, if the amount of brown discharge is more than the amount of menstruation, accompanied by severe abdominal pain, it may be due to the occurrence of placental abruption and other abnormalities, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, and to take appropriate measures to deal with it.