Doing Great Survival is uncertain for extremely low birth weight newborns, such as Owen (shown here) and his twin brother, Oliver. However, Owen and Oliver’s chances are excellent, partly because they are receiving specialized care at the neonatal intensive care unit (NICU) at Mount Sinai Hospital in Toronto. Medical advances, such as those at Mount Sinai Hospital, have led to decreased mortality rates of at-risk babies.

LUCAS OLENIUK/TORONTO STAR VIA GETTY IMAGES