Signs before the delivery of a second child include abdominal cramps and lumbar pain, bouts of pain, frequent urination and redness, etc., and the presence of redness should alert you to the onset of labor. Vaginal discharge of blood-colored secretion is known as redness. Redness is caused by the opening of the uterus, which separates the endocervix from the fetal membranes, resulting in a small amount of bleeding, which is usually smaller than the amount of menstruation and darker in color. Usually, you need to go to the hospital as soon as possible for checkups within a few hours after seeing red. For first-trimester pregnant women, regular contractions start two or even several days after seeing red, while second-trimester pregnant women’s uterine orifice opens faster after seeing red, so you should go to the hospital immediately when you see red. When a pregnant woman is close to her due date and has symptoms of labor, she should go to the hospital immediately to avoid adverse effects on the woman and the fetus.