Why do some babies need to stay in the NICU?
Babies may need to be admitted to the NICU for a number of reasons after being born.  The primary reason is premature birth, which can cause a number of complications such as respiratory distress syndrome, hypoglycemia, apnea, low birth weight and bradycardia.  A baby will typically stay in the NICU until their complications are resolved and they are healthy enough to be discharged.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Why do some babies need to stay in the NICU?
### Input: 
### Response: Babies may need to be admitted to the NICU for a number of reasons after being born.  The primary reason is premature birth, which can cause a number of complications such as respiratory distress syndrome, hypoglycemia, apnea, low birth weight and bradycardia.  A baby will typically stay in the NICU until their complications are resolved and they are healthy enough to be discharged.