Since the early days of neonatal medicine, controversy has existed about when to provide intensive care for infants born at the earliest survivable gestational ages.1 For some infants born too soon, any attempt at life-sustaining treatment has no real chance of success. For other infants born just weeks later and ounces heavier, treatment likely results in survival. Births between these extremes (during the periviable period) have been complicated by variations in practice, expectations, and the resulting data.
Rysavy MA, Ehret DEY. Extremely Preterm Birth Outcomes in Sweden. JAMA. 2019;321(12):1163–1164. doi:10.1001/jama.2019.2020
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