Neonatal nurse Kirsty Hartley carries premature baby Theo Anderson to his mother Kirsty Anderson in the neonatal intensive care unit at the Lancashire Women and Newborn Centre at Burnley General Hospital in East Lancashire, Burnley, Britain . REUTERS/Hann

Neonatal nurse Kirsty Hartley carries premature baby Theo Anderson to his mother Kirsty Anderson in the neonatal intensive care unit at the Lancashire Women and Newborn Centre at Burnley General Hospital in East Lancashire, Burnley, Britain . REUTERS/Hannah McKay/Pool