<prompt> Pain in early labor is limited to dermatomes:T10-L1S1-S3L4-L5L2-L3  <response>: Ans. is a, i.e. T10 -L1 Ref: Dutta Obs 7e, p 117In the early stages of labour pain is mainly uterine in origin because of painful uterine contractionThe pain of uterine contractions is distributed along the cutaneous nerve distribution of T10 to L1 Ref. Dutta Obs, 6e, p 118In later stages pain is due to dilatation of the cervix.The pain of cervical dilatation and stretching is referred to the back through sacral plexus.Ref. Dutta Obs, 6e, p 118 