Effectiveness is the capability of producing a desired result. When something is deemed effective, it means it has an intended or expected outcome, or produces a deep, vivid impression.
The average newborn sleeps about 16 hours a day, but some need much less sleep and some much more. Also, it's not uncommon for a newborn's sleep pattern to change from day to day; he may sleep substantially less than usual one day and then catch up by sleeping more the following day.
Discover the hows and whys so that you can get back to those restful nights. Newborns less than three months old sleep between 14 and 17 hours each day. As few as 11 hours and as many as 19 hours may be appropriate. Infants (between 4 and 11 months old) sleep between 12 and 15 hours each day.