This document summarizes a seminar on cleft lip presented by Dr. Cathrine Diana. It discusses the history, embryology, etiology, epidemiology, classifications, parent counseling, feeding, surgical procedures, post-operative care, and recent advances related to cleft lip. The key topics covered include the causes of cleft lip being multifactorial including genetic and environmental factors, classifications according to location and severity, importance of pre-surgical orthodontics and nutrition management, and surgical techniques for lip repair and reconstruction.