The most common sign of labor is redness, which is the appearance of a small amount of vaginal bleeding, often mixed with cervical mucus, when the cervical opening begins to move, the nearby fetal membranes are separated from the uterine wall, and bleeding occurs from the rupture of capillaries. 2. The duration of pain will be gradually prolonged and the interval will be shortened to 3-5 minutes. 3.Rupture of water, clinically known as rupture of fetal membranes, is caused when the pressure in the uterine cavity gradually increases with the strong contraction of the uterus, the opening of the uterus slowly opens up and the head of the fetus descends. In addition to this, there will be other symptoms such as frequent urination, a feeling of ease in the abdomen, and also a feeling of swelling in the anal area.