Newborns need a lot of sleep each day, but unfortunately, for most this will not equate to a consistent 8 straight hours each night.  Newborns sleep, on average, 15-18 hours a day but the longest stretch will only normally be 3-5 hours.  By the time baby reaches 3 months old, he will need about 15 hours of sleep.  The average nightly sleep should be between 4-6 hours with a few daytime naps as well.

Parents shouldn't be too concerned about the exact amount of time their baby sleeps, or whether he is sleeping for 4 or 7 straight hours at night.  The parent's focus should be on the child's behavior while they are awake.  Is the baby healthy?  What is their temperament?  Is the baby giving signals that they are not well rested (rubbing eyes frequently, yawning frequently, long periods of fussiness or restlessness).  If your baby is only sleeping 13 hours a day instead of 15, but seems happy and well rested, then they are most likely in a healthy sleep pattern for their own unique requirements.

The timing of sleep, and setting a schedule is vital to getting baby in a healthy sleep pattern.  Babies should have both morning and afternoon naps at a consistent time each day.  Parents should place the baby in their crib or bassinet before baby is completely asleep.  This will help the baby learn to fall asleep independently and to self-sooth.  Keep the room dark and quiet to signal to the baby that it is time for sleep.

If you feel that your baby is sleeping too much or not enough, consult your pediatrician...especially if the child's behavior or temperament is abnormal.  Keep in mind that many things can affect the quality of your child's sleep such as stuffy noses, dogs barking, company visits, and room temperatures.  

Identify the times of day that your baby seems most ready for naps and set the nap schedule based on the cues he provides.  Getting set on this schedule at an early age will pay off in a happier baby and a happier mom and dad.