Apgar score is a commonly used criterion to judge whether a newborn is born with or without asphyxia, based on five items: skin color, respiration, heart rate, muscle tone and cry at birth, and each score is given on a scale of 0-2. A general Apgar score of 7 or more indicates that the child was born in a relatively good state, without significant hypoxia or asphyxia, and a score below 7 suggests that the newborn has hypoxia or asphyxia. If a newborn is born with a postnatal score below 7, active resuscitation needs to be done, followed by another post-resuscitation evaluation 5-10 minutes after birth.