SAMUEL ASHFIELD / SCIENCE PHOTO LIBRARY SAMUEL ASHFIELD / SCIENCE PHOTO LIBRARY
Premature baby being comforted in an incubator. Its heartbeat is being monitored by the electrocardiogram (ECG) electrode attached to its chest. It is being fed through a nasogastric tube. A baby born before 37 weeks of development may require medical monitoring. Its immune system and internal organs will be underdeveloped, and it may have difficulty maintaining a constant body temperature.
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