(KMOV.com) -- Experts have long recommended all babies be put to sleep on their backs in order to decrease the risk of sudden infant death syndrome.
But new research shows too much time on the back is leading to flat spots on the head for many babies.
A new study in the journal Pediatrics looked at 440 infants in Canada and found nearly half of two-month-olds had the condition.
Researches do say there are some things parents can do to prevent flat spots.
“When they fall asleep you can turn their head to the other side so there’s more pressure on the other side,” said Dr. Suzanne Kaseta with Washingtonville Pediatrics.
Officials also add parents should limit their baby’s time in the car seat or swing, so they’re not leaning back on their head, and to make sure babies get plenty of tummy time when they’re awake.