Scientists say, what may take longer however, is for the baby's eight hours of sleep to conform to the family's sleep schedule.
For instance, researchers found by 2 months of age, many infants were likely to be sleeping straight through from midnight to 5 a.m.
From 10 p.m. to 6 a.m., which is ideal for many people, infants are most likely to begin sleeping during this time at three months, with over 50 percent doing so at 5 months.
The study in the journal Pediatrics also acknowledges many infants still won't meet these milestones even at 1 year of age.
