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.
How Long Will My Newborn Sleep? A newborn may sleep up to 18 hours a day, waking every couple of hours to feed. Breastfed babies feed often, about 8 to 12 times a day. Bottle-fed babies tend to feed less often, about every 3 to 4 hours or so. Because the need for food is stronger than the need for sleep at this age, babies who sleep for longer stretches should be awakened to feed.