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 to 4 Weeks. Newborn babies sleep a total of 16 to 20 hours day during the first two to three weeks of life. The total sleep hours are distributed evenly over night and day, with the infant waking every three to four hours for feedings. Breastfed babies may awaken as often as every two hours for feedings.