Final answer:
When a macrosomic infant's head retracts against the perineum after being born, it is referred to as 'turtle sign.' This is normal for large infants, and extra pushing efforts by the mother may be necessary to deliver the baby.
Step-by-step explanation:
When the head of a macrosomic infant retracts against the perineum after being born, it is referred to as 'turtle sign,' and it is considered normal for large infants. This happens because the perineal tissues need time to stretch and accommodate the baby's head. In such cases, extra pushing efforts by the mother may be necessary to facilitate the delivery of the baby.