This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Pain in early labor is limited to which dermatomes? 
Select and explain. 
A. T10 -L1, B. S1-S3, C. L4-L5, D. L2-L3
A: T10 -L1
Answer: A: T10 -L1 
Explanation: In the early stages of labour pains are mainly uterine in origin because of painful uterine contractions It is distributed along the cutaneous nerve distribution of T10 - L 1. In the later stages pain is due to cervical dilatation This pain is referred to back through sacral plexus. Ref: Dutta Obs 9e pg 112.