Apnea of prematurity occurs when a premature baby (born before 37 weeks) experiences breathing pauses that last more than 20 seconds. Sometimes, the pauses can be shorter but still cause the baby’s heart rate to drop below 100 beats per minute, or lead to a bluish skin color (central cyanosis) or low oxygen levels (below 85%).
The main cause is that the baby’s brain and nervous system, which control breathing, are not fully developed yet (central apnea). In some cases, if the breathing pause is long, there might also be some blockage in the airway.
About 25% of premature babies experience apnea of prematurity. This usually starts 2 to 3 days after they are born and rarely occurs on the first day.
The risk of apnea of prematurity is higher in babies born at an earlier gestational age (born earlier than expected).
The good news is that most premature babies outgrow apnea by the time they reach 37 weeks of corrected age (weeks since conception) and almost all by 44 weeks. The prognosis is excellent, meaning the condition typically resolves on its own as the baby matures.
