When the placenta and endometrial tissues are separated at the time of preterm labor, the discharge increases and even appears with blood, which means that it may be red, and when regular contractions occur within 48 hours after the redness, it is the first stage of labor. If there is only an increase in leucorrhea without any blood, you should still observe and wait for the investigation. During this period, you should pay attention to hygiene, pay attention to timely washing, and pay attention to detect the change of fetal heartbeat.