This document summarizes the stages of labor. It describes 4 stages: 1) preparatory stage with lightening and cervical changes, 2) active labor involving cervical dilation until fully dilated, 3) expulsion stage when the fetus is pushed through the birth canal, and 4) delivery of the placenta. Each stage is defined with details on duration, phenomena, cervical dilation curve, and management techniques to ensure delivery and control of hemorrhage.