LARRY MULVEHILL / SCIENCE PHOTO LIBRARY LARRY MULVEHILL / SCIENCE PHOTO LIBRARY
Nurse checking the pulse of a premature baby in an incubator. Babies are considered to be premature if the delivery occurs before the 37th week of pregnancy. Premature babies are smaller and their internal organs are not well developed. In the incubator oxygen, temperature, and humidity levels are monitored to provide premature infants with the ideal conditions for survival.
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