When do babies' sleep issues need a specialist?
New parents who struggle to get babies to sleep through the night may not be doing anything wrong, according to new research suggesting that many apparent sleep problems are really part of normal infant development.
For example, the study has found that six-month-old babies still take 20 minutes, on average, to fall asleep.
And by age two, toddlers still wake up an average of once each night.
The study has also found that a lot of variation is normal, says lead author Dr Juulia Paavonen of