Usually the time between the opening of one finger and three fingers of the uterine opening in a first-time labor is usually around 11-12 hours, which is also called the first stage of labor. In most cases, the first labor, at most, will not exceed more than 24 hours; if it exceeds, then it is considered to be a stalled first stage of labor. For menstruating women, since they have already given birth, the cervical opening is softer and the uterine opening is faster, so the duration of the first stage of labor is usually around 6-8 hours, and in some cases, it is even around 4 hours. The first stage of labor for women in labor usually lasts no more than 16 hours.