Why do infants’ butts stick up while they sleep on their stomach, being that this peculiar place would certainly be impossible for any adult or even toddler to sleep through?

“Babies sleep via their butts in the air bereason they like the comfort of tucking their legs under their body,” claims Dr. Lisa Lewis, MD, a board certified pediatrician in Ft Worth, Texas, and writer of “Feed the Baby Hummus, Pediatrician-Backed Secrets from Cultures Around the World.”

“Sleeping with the butt up simulates the womb place,” continues Dr. Lewis. “Baby had a curled-up place in the uterus, which was secure and also calm.

You are watching: Why do babies sleep with their butts in the air

“A baby’s muscles might feel ‘tight’ early from the extended comfort womb position.

“As they flourish, their arms and legs will certainly stretch and they will certainly progressively prosper out of this position.

“Between ages 6 and also nine months, as babies gain even more mobile, they might additionally fall asleep in a ‘near crawl’ place through the butt up.”

Different Body Proportions

Take a look at infants resting on their stomach via their butts up in the air. It’s additionally simple to define this place simply through this motto: “Due to the fact that they deserve to.”

An infant’s head is just one-fourth the size of their body. An adult’s is one-eighth.

However, just as striking is the length of an infant’s legs, relative to their torso.

Their legs are practically stubs when compared to the torso. The bit, and also extremely functional, stubs deserve to easily fold under the pelvis and also enable the baby to sleep on their stomach via their butt sticking up.

Now imagine among the babies in the photos here having actually legs much longer than their torso. In some adults, simply their thigh bones alone are much longer than their torso.

If a baby had actually such proparts, the infant would certainly not be able to tuck or fold their legs under them so comfortably.

Try doing that: Get on your bed and also try to mimic the place of a resting baby with its butt in the air.

Get your legs under your pelvis and also lay the side of your challenge to the bed.

Your legs will be way too long to crowd under you. Even a gymnast would uncover trying to mimic this common infant position difficult.

It’s not so a lot an problem of flexibility as it is leg size family member to torso size. Even the most versatile yogis don’t sleep this way.

Unfortunately, as comforting as this place is to an infant, the memories of resting this way will certainly never be kept, considering that our infant memories obtain forever lost as the brain creates.

If your infant naturally gravitates to tucking their legs under them through their butt up in the air, simply let them be, as this is perfectly normal and also will be gone prior to you know it.

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Dr. Lewis has actually been a practicing pediatrician for over 20 years. She completed her pediatrics residency at Texas A&M College Health Science Center, Scott and White Memorial Hospital wbelow she served as chief resident.
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Lorra Garrick
has been extending clinical, fitness and also cyberprotection topics for many type of years, having created thousands of write-ups for print magazines and also websites, including as a ghostwriter. She’s likewise a former ACE-certified individual trainer.