Cleft lip and palate is a birth defect caused by failure of fusion of the facial prominences during embryonic development between 4-12 weeks of gestation. It can involve the lip, alveolus, hard and soft palate. The document discusses the anatomy, embryology, classification, clinical manifestations, diagnostic evaluation, management including surgical techniques, and nursing care of infants with cleft lip and palate. Key aspects of nursing management include addressing feeding difficulties, preparing parents for surgery and their infant's needs, and educating on postoperative care to support healing.