Prematurity is a leading cause of Infant mortality and morbidity. All infants born premature are at risk for serious health problems; however, the earlier an infant is born, the greater the risk of medical complications, long-term disabilities, and death.

The measures presented here include only singleton births. Multiple births (twins, triplets, etc.) are a major known risk factor associated with premature birth and were excluded in this data in order to focus on other possible risk factors.

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