<prompt> Pain in early labour is limited to dermatomes-T11 T12 L1S1 S3L4 L5L2 L3  <response>: Labor pain caused by uterine contractions and cervical dilation is transmitted through visceral afferent sympathetic nerves entering the spinal cord from T10 - L1. Later in labor, perineal stretching transmits painful stimuli through the pudendal nerve and sacral nerves S2 - S4. 