Advertisement

Why doesn't my infant sleep through the night?

In the first few weeks of life, babies don’t have a circadian rhythm going yet which helps them to know the difference between daylight and nighttime. This rhythm, or body clock, starts ticking at around six weeks of age. But what’s more critical to the sleep rhythms of infants is their need for nourishment. In other words, it’s not so much that babies are missing the “on” and “off” switch that adults have when it comes to day-and-night cycles. It’s that babies cannot hold enough food (i.e., breast milk or formula) in their bellies to get through the night without needing more calories for growth.

It takes a baby a few months to grow a belly big enough to accommodate enough calories so they may rest for longer periods without needing to fill up again. And because breast milk in particular gets digested more quickly than formula, moms who exclusively breastfeed typically find themselves tending to their tots more frequently than those who are formula-fed.

Continue Learning about Sleeping & Napping In Babies

Is it okay for my baby to sleep on her side?
First CandleFirst Candle
In 1992, the American Academy of Pediatrics (AAP) recommended both the side and the back sleeping po...
More Answers
How can I help my newborn get enough sleep?
Dr. Michael Breus, PhDDr. Michael Breus, PhD
Newborn babies will sleep 11 to 18 hours day, but any new parent knows there’s no predicting exa...
More Answers
How much sleep does my infant need?
Dr. Tanya R. Altmann, MDDr. Tanya R. Altmann, MD
Infants usually sleep between 12 to 14 hours in a 24 hour period. However, in this video, I will exp...
More Answers
How Can I Put My Baby On a Sleep Schedule?
How Can I Put My Baby On a Sleep Schedule?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.