Final answer:
During CPR on a newborn, the baby's heart rate should be checked at the 60-seconds mark after starting compressions as part of the resuscitation process, according to the Apgar score system.
Step-by-step explanation:
When performing cardiopulmonary resuscitation (CPR) on a newborn, you should check the baby's heart rate after starting compressions at 60-second intervals. According to the Apgar score system, which includes assessment of heart rate and respiration as two of the most critical criteria, the quick response and accurate measurement of these signs are essential in determining the newborn’s condition and necessary interventions.
The Apgar scores are typically taken at 1 minute and 5 minutes post-birth. In a CPR scenario, after you begin chest compressions, which should be delivered at a rate of about 100 compressions per minute, you would then check the newborn’s heart rate at the 60-seconds mark to evaluate the efficacy of the compressions and determine the next steps in resuscitation efforts.