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.
Newborn babies sleep a lot. Expect your baby to be asleep for up to 18 hours out of every 24 in his first few weeks (ISIS 2013). But he wonât sleep for more than one hour to three hours at a time, day or night, as he will need frequent feeds (ISIS 2013, NSF nd). This means that you can expect some sleepless nights, especially at first.