<prompt> Pudendal nerve block ?S1-3S2-4S3-5S4,5  <response>: Ans. is b i.e., S2-4 Pudendal Nerve Block It is a peripheral nerve block that provides local anesthesia over S 2-4 dermatomes majority of perineum and inferior quaer of vagina It does not block the superior bih canal so the mother is able to feel the uterine contractions. 