Sleep-deprived new mothers and fathers can't wait to have their baby sleep through the night. Recent research suggests that about half the babies sleep through the night after about two or three months.

From five months on, and earlier for some families, parents can realistically expect to experience an uninterrupted and substantial period of sleep. However, there will still be some who won't get reprieve until after their child's first birthday.
Researchers looked at sleep patterns across the first year of life for 75 healthy, full-term newborns in New Zealand. They based their assessment on three different criteria: sleeping from midnight to 5 a.m., sleeping through an unspecified eight hours of the night, and sleeping from 10 p.m. until 6 a.m. Parents kept a diary for six days of each month for 12 months, with the accuracy checked by time-lapse video.
It was found that the most rapid increase in uninterrupted sleep occurred between one and four months, during which time babies gradually stretched their sustained snooze time by nearly three hours. At five months of age, half the infants were giving their parents what is usually considered a normal night's rest; by sleeping from 10 p.m. until 6 a.m. Babies reached the less strict milestones earlier. Half of the babies slept from midnight to 5 a.m. by three months of age and 8 hours a night by four months. By 12 months, 85 percent of the babies met these two criteria. However, at this point, one out of every four babies still wasn't sleeping the full span from 10 p.m. to 6 a.m.
Many infants have difficulties in consolidating their sleep and frequently wake during the night, which is a source of distress for the family. Understanding normal maturation may help in developing interventions and early prevention tools. Such sleep-promoting tools could include creating a sleep environment that is quiet, dark and at an appropriate temperature; maintaining consistent routines and sleep schedules; encouraging a baby to fall asleep and resume sleep in their cribs with little help; and gradually increasing intervals between night feeds.
Parents should be aware that the developmental process by which infants learn to sleep at night with minimal interruptions occurs very rapidly during the first six months. And if they do not see a tendency towards better sleep during these months they should consider consulting a doctor regarding potential physical or medical factors that may play a role in disrupting sleep.
DoctorNDTV is the one stop site for all your health needs providing the most credible health information, health news and tips with expert advice on healthy living, diet plans, informative videos etc. You can get the most relevant and accurate info you need about health problems like diabetes, cancer, pregnancy, HIV and AIDS, weight loss and many other lifestyle diseases. We have a panel of over 350 experts who help us develop content by giving their valuable inputs and bringing to us the latest in the world of healthcare.