This document provides an overview of obstetric brachial plexus palsy (OBPP), which is an injury to the brachial plexus nerve network occurring during delivery. It describes the anatomy and classifications of OBPP, including Erb's palsy and Klumpke's palsy. Risk factors like shoulder dystocia and prolonged labor are discussed. The document outlines the clinical presentation, affected nerves, sensory and muscle deficits, and complications of OBPP. Management includes physiotherapy, surgery if movement does not return after 3 months, and various surgical procedures for severe cases.