Preterm infant characteristics
Very small and appear thin because they have little to no subcutaneous fat deposits.
They also have a proportionately large head in relation to the body, which reflects the cephalocaudal direction of growth. The skin is bright pink, smooth, and shiny, with small blood vessels clearly visible.
The fine lanugo is abundant over the body but is sparse, fine, and fuzzy on the head.
The ear cartilage is soft and pliable, and the soles and palms have minimum creases, resulting in smooth appearance. The bones of the skull and ribs feel soft, and before 26 weeks the eyes may be fused.
Male infants have few scrotal rugae, and the testes are undescended; the labia minora and clitoris are prominent in females.