Which of the following factors is NOT used to determine an APGAR score?

The APGAR score is a quick assessment tool used to evaluate the health of newborns immediately after birth. It assesses five criteria: Appearance (color), Pulse (heart rate), Grimace response (reflexes), Activity (muscle tone), and Respiration. Each of these factors contributes to a score that helps determine the need for immediate medical attention.

Length of the infant is not one of the criteria used in calculating the APGAR score. While factors like color, heart rate, and muscle tone are critical in assessing a newborn's condition, length does not provide relevant information about the infant's immediate health status or require urgent intervention. The APGAR scoring system is designed to be straightforward and focused on aspects directly related to the newborn’s physiological status right after delivery.