Which newborn finding is consistent with a postmature infant?

Which newborn finding is consistent with a postmature infant?

• A. Peeling, parchment-like skin
• B. Good muscle tone
• C. Deep creases at the base of the toes extending to the heels
• D. Soft, smooth skin

Answer: (C)

Postmature newborns show signs from prolonged intrauterine life, with the skin reflecting desiccation and wrinkling. The most telling finding is deep creases that extend from the base of the toes up to the heels. This pattern of extensive plantar creases happens as the skin has had more time to dry out and wrinkle after a long gestation, indicating postmaturity. While parchment-like peeling skin can also appear in postterm infants, the pronounced deep creases on the soles are more characteristic and help distinguish postmaturity from term or preterm skin presentations. In contrast, good muscle tone and soft, smooth skin are not specific indicators of postmaturity and are more typical of term or broader maturation ranges.

Postmature newborns show signs from prolonged intrauterine life, with the skin reflecting desiccation and wrinkling. The most telling finding is deep creases that extend from the base of the toes up to the heels. This pattern of extensive plantar creases happens as the skin has had more time to dry out and wrinkle after a long gestation, indicating postmaturity. While parchment-like peeling skin can also appear in postterm infants, the pronounced deep creases on the soles are more characteristic and help distinguish postmaturity from term or preterm skin presentations. In contrast, good muscle tone and soft, smooth skin are not specific indicators of postmaturity and are more typical of term or broader maturation ranges.