Decision-making at the border of viability: determining the best interests of extremely preterm infants.

This paper proposes and employs a framework for determining whether life-saving treatment at birth is in the best interests of extremely preterm infants, given uncertainty about the outcome of such a choice. It argues that given relevant data and plausible assumptions about the well-being of babies with various outcomes, it is typically in the best interests of even the youngest preterm infants-those born at 22 weeks gestational age-to receive life-saving treatment at birth.