Baby’s Ribs Stick out When Lying Down – Why & What to Do

Your little bub is perfect, with 10 little toes and 10 little fingers you breathe them in and feel complete! Your baby relies on you for every need so it is no wonder many moms panic when they see things that look out of place. If you have noticed that your baby’s ribs stick out when lying down, keep reading to find out if this is normal.

Baby’s Ribs Stick Out When Lying Down – Should I Be Worried?

You watch your little ones’ every move and notice that your baby’s ribs stick out when lying down but is this normal. It is completely normal for your baby’s ribs to protrude slightly when they are lying down, it can be on one side or on both. In fact, many healthcare providers call it a common phenomenon. 

Understanding the Normal Rib Cage Structure of a Baby ?

Before diving into concerns about the ribcage, I think it’s essential to familiarize ourselves with the basics of a baby’s rib cage. Trust me, understanding the rib cage structure can shed light on many of the visual changes and behaviors we see in our little ones.

The rib cage? Yep, it’s that shield-like structure that cradles the heart, lungs, and other vital organs. Typically, it’s composed of 12 rib pairs, which connect to the spine and the breastbone. In our tiny tots, this cage is notably flexible and a bit smaller. It makes sense since their lungs are still growing and need that extra space. The whole system is designed to keep those delicate organs safe.

You’ve got three types of ribs:

• True ribs, the first seven, attached right to the sternum.
• False ribs, the next five, connected to each other but not the sternum.
• And the floating ribs, the last two, not attached to the sternum.

It’s fascinating, right? Especially when you learn that the rib cage isn’t rock solid at birth. Over time, the cartilage at the ribs’ ends hardens, making the rib cage more rigid. Here’s a simple table to break it down:

Why Do My Baby’s Ribs Stick Out On One Side?

Babies under 12 months of age have ribs that are mostly made of cartilage, which ossify with calcium deposition at a later age. This is why it is a normal phenomenon for parents to notice their baby’s ribs more especially when they are lying flat. The lower two ribs are classed as floating and do not attach to their sternum in front, it is these ribs that parents may see and feel worried that they are sticking out.

This may be more noticeable on one side but is still nothing to worry about.

According to the National Library of Medicine and their research on rib cage geometry in infants and very young children, ribs in young children are found to be more horizontal and the sternal clavicular heads and diaphragmatic domes higher than in older children. Similarly, the cross-sectional chest shape changed from the rounded infantile form to the more ovoid adult form by the same age.

To put this research into terms, we parents can understand it is normal for a baby’s rib cage to appear flatter and their diaphragm can appear higher.

Knowing the results of this research it is obvious that your baby’s skeleton will be considerably different in the early stages of their life. With the findings, ribs being more horizontal yet rounded and sternum head higher it helps us understand why your baby’s rib cage may protrude and us moms and dads can expect that they will ossify and take on the more traditional shape as our babies grow.

Why Do Baby’s Ribs Stick Out When Lying Down? ?

Between diaper changes and those 2 AM feedings, you might have caught a glimpse of your baby’s tiny ribs sticking out when they’re catching some Zs. Trust me, every little thing they do can make your heart race with worry. Here’s the low-down:

• Underweight baby. If your little one is a tad underweight, their ribs might be more on display. It’s because their skin and muscles haven’t beefed up, making those ribs more noticeable.
• Thin baby. Some babies, bless their hearts, are just naturally slender. It’s not a weight issue; they might just have a tinier rib cage.
• Breastfed baby. You might’ve noticed that breastfed babies sport a rounder tummy than their formula-fed peers. That’s because our magical mama milk is easier for their tummies to handle. And sometimes, it means their ribs peek out a bit more.
• Baby with a petite chest. Some babies just have daintier chests. But don’t you fret – they’ll fill out as they grow.
• Baby with respiratory issues. Little ones battling the likes of asthma or a nasty bout of pneumonia might have ribs that pop as they’re working a bit harder to breathe.
• Baby with a rib cage oddity. Though it’s as rare as a peaceful night’s sleep with a newborn, some babies might have a rib situation due to genetics, birth happenings, or infections.

Other Reasons for a Protruding Rib Cage

‣ Diet – Diet can have a major part to play when a baby’s rib sticks out. In those early months, our babies grow rapidly in height and weight but sometimes babies can shoot up in length and it can take a while for their weight to catch up. 

Usually, there is nothing to worry about because every baby grows at different rates but if your baby grows in height their weight needs to increase. According to the Cleveland clinic, a baby under the age of two is classed underweight if their weight drops to the bottom 5th centile compared to their height. Over the age of two professionals will refer to their body mass index for an indication of a healthy weight.

It is important to remember that we are all different shapes and sizes so as long as your baby is feeding well and healthy then there is nothing to be concerned about, especially during the early stages of their lives. Your health care professional will observe your baby’s weight and height and they can flag if something is not quite right. 

‣ Deformity – It would be irresponsible for us not to talk about rib cage deformity no matter how rare it may be. In babies rib deformity can look like the following:

• Extra (supernumerary) ribs.
• Ribs that are fused together.
• Abnormally short ribs.
• Abnormally shaped ribs.
• Missing ribs (agenesis of ribs).

Any of these conditions can make a child’s rib cage look different from what we would usually expect. If you suspect any of the above then contact your doctor for advice. They will recommend an x-ray to give a clearer picture of what’s going on. 

For more detailed information on deformities and what they would look like head to the Children’s Hospital of Philadelphia.  They explain in detail what the steps would be when going through diagnoses and the treatments that may be available. 

Please note that this is merely guidance and at this point, if you suspect any deformities with your baby’s rib cage then your doctor should be your first point of contact. 

‣ Vitamin deficiency – As we know babies are fed either formula or breast milk. Both ways of feeding allow your baby to gain the amazing nutrients they need to thrive. The one vitamin that helps our bones to grow is the wonderful Vitamin D. Our bodies absorb this nutrient from the sun. As babies are tiny little people we love to cuddle and swaddle them tight. Please don’t get me wrong this is not a bad thing to do but parents must be aware that as we layer our babies in clothing and blankets, especially in the colder months they cannot absorb as much vitamin D as we adults. 

Lack of this vitamin can cause something known as “Pigeon Chest.” This causes the ribs to protrude, looking bird-like. Most of the time it is a cosmetic issue and may not lead to any future problems but in some cases, it could result in problems with their spine and posture. 

What to Do About Baby’s Ribs Sticking Out When Lying Down? ?

More often than not, those sticking out ribs are just a phase. But if you’re like me, you’re always searching for answers, and maybe even a little peace of mind. If the thought won’t quit nagging you, have a chat with your pediatrician. They’re the pros after all.

• Ensure that your tiny tot’s getting enough munchies. A full baby’s ribs tend to play hide and seek a little better.
• Put ’em in comfy clothes. Just like how we adore our roomy PJs, they’ll appreciate the breathing room.
• A side sleeping position during naps might just do the trick.
• And if those little lungs are having a tough time, get some guidance on managing their condition.

How to Properly Position Your Baby When Lying Down ?

Alright, onto the real talk. Knowing how to position your baby correctly when they’re catching those Z’s is super important. Top of the list? Always let them sleep on their back. It’s the safest bet and slashes the risk of Sudden Infant Death Syndrome (SIDS) big time.

So, how do you get it right?

• Opt for a firm, flat sleep surface. Nix the pillows, quilts, or fluffy sheepskins.
• Aim to have your baby’s head in the middle of that sleep space.
• A little chin tuck goes a long way.
• Empty crib policy! No toys, blankies, or plush pals in there.

And just as crucial, here’s what not to do:

• Never let them sleep on a soft spot, like a cushy couch or waterbed.
• Avoid having them on their side or tummy.
• Keep their sleep environment free from stuff that can hinder breathing.

Got a baby with reflux? I’ve been there. Still, having them on their back is the way to go. A few pro tips: burp them well post-feedings, keep them upright for about 30 mins after eating, and consider a wedge pillow to keep their head slightly raised.

To sum it up, here’s a table showing sleeping positions and associated SIDS risks:

While we’re at it, let me sprinkle in a few extra safe-sleep pointers:

• Share your room (but not your bed) with your baby for the first 6 months.
• Steer clear of smoke and ensure a smoke-free environment for your baby.
• Dress ’em in light, comfy clothes.
• Set the room ambiance: cool and dim.
• Don’t overstuff their tiny tummies with food.
• Swaddle, but not too snug!

When Do I Consult a Doctor?

Usually, as your baby grows and gains weight their ribcage will start looking as we would expect but it doesn’t hurt to mention it to your doctor even if it helps alleviate your anxiety and worry!

Your doctor can assess and evaluate your baby and may wish to see them with a six-month gap to monitor their growth. But on the rare occasion that your doctor suspects something other than the typical, a consultation with a pediatric endocrinologist could be recommended. Pediatric endocrinologists are experts in this field and can refer you for an X-ray of the chest to rule out deformities which are usually seen in Vitamin D or Vitamin C deficiency.

Things You Gotta Know ?

Ever wondered if it’s just your baby or if others are in the same boat? Well, here’s a quick dive into some comparisons and facts:

• How common is it? About 1 in 3 babies flaunt their ribs at some stage. So, you’re certainly not alone on this one.
• When’s the debut? This rib-revealing phase can start from day one, but it’s usually the older babies and toddlers that pull this stunt.
• Exit stage? For most kiddos, it’s just a phase. As they grow, their ribcage will too. However, a few might hold onto this trait.
• Can I play defense? There’s no guaranteed way to keep those ribs undercover. But a full belly and some loosey-goosey clothing might help.
• Risks? On its own, it’s not much of a concern. But if it’s teamed with other symptoms or if that mom instinct is tingling, give your pediatrician a shout.

Nurturing Strong Bones in Our Little Ones ?

First off, ensuring our babies are munching and slurping on the right stuff is essential. It’s a foundation we can’t skip over. 

A Wholesome Diet for Robust Bones

The role of calcium is undeniable when it comes to bones. Here’s a nifty list of calcium-packed foods to include:

• Dairy delights: think milk, cheese, and yogurt.
• Nondairy drinks but with an extra punch of calcium: soy milk and calcium-enriched orange juice.
• Greens that pack a punch: broccoli, bok choy, and kale.
• Tofu, but make sure it’s got added calcium.
• Fishy favorites with bones: salmon, sardines, and mackerel.

Calcium Champions in Our Pantry

But hey, calcium isn’t the lone ranger. Vitamin D’s got its back! It helps our little ones absorb the calcium goodness. For a healthy dose of Vitamin D:

• Dive into fatty fish: salmon, tuna, and mackerel.
• Egg yolks, they’re more than just a pretty yellow!
• Fortified champs: milk, cereal, and orange juice.

Sun-Kissed Vitamin D Sources

On the Move: Baby Steps to Stronger Bones

Who knew? Every wriggle, jump, and crawl not only builds muscles but also strengthens those tiny bones. It’s nature’s way of workout. So, make room for play that gets them moving and grooving – think jumping, running, and even a tad bit of climbing (with supervision, of course).

A Safe Play Space: Dodging Those Tumbles

Let’s be real. Babies are experts at taking unexpected dives and tumbles. As much as these falls are a part of growing up, we can’t ignore the fact that they can be a bit dicey for those tender bones. A few things I swear by:

• Baby gates for those adventurous stair expeditions.
• Furniture bumpers – a real noggin saver!
• A toy-free zone. Seriously, toys love to sneak under our feet.

Rethink Those Sugary Sips

Sweet drinks might be a quick win with the little ones, but they’re no friend to the bones. Water, milk, or a splash of unsweetened juice is the way to go.

Table of Sugar Content of Sugary Baby Drinks

As you can see, many sugary baby drinks are high in sugar. It is important to limit the amount of sugary drinks that babies and toddlers consume. Instead, offer them healthy snacks and drinks, such as water, unsweetened milk, and whole fruits and vegetables.

Regular Check-ins with the Doc

Our tiny humans change so fast, and it’s easy to miss something. Regular check-ins with your pediatrician can catch anything that might slip by. They’re the pros, after all.

Quick Tips for Bone Boosting

• Nothing beats breast milk for the first 6 months. It’s nature’s cocktail of calcium and essential nutrients.
• If formula is your jam, pick one that boasts calcium and vitamin D.
• A heads up – cow’s milk and babies under 1 year? Not the best mix. It messes with the iron in breast milk and formula.
• For those special little tummies with allergies or sensitivities, have a chat with your doc. There’s always a workaround to ensure they get the nutrients.

Wrapping Up

If we were all identical then life would be confusing. People we love wouldn’t have unique talents and features, this is why you shouldn’t feel any concern when thinking ‘why do my baby’s ribs stick out when lying down?’ It is only more noticeable in some children because we all develop at different stages. Your little beauty is simply developing and growing at their own rate with the love, care, and affection you clearly hold. 

Being a parent is stressful and you will always have worries and concerns. If you feel like the protruding is worsening with age then it wouldn’t hurt for you to get advice sooner rather than later.

More to Read:

• Does cold milk cause gas in babies?
• How To Stop Toddler Clenching Legs Together During Diaper Change: Top 7 Methods
• How To Make Your Baby Stop Grinding Teeth: The Complete Guide

FAQs

My Baby’s Ribs Stick Out!

? How does a baby’s ribcage develop during the first year of life?
The development of a baby’s ribcage during the first year is an intricate process. Initially, a newborn’s ribs are more cartilaginous and soft, allowing flexibility for growth and breathing. As they approach their first birthday, these ribs start to harden and ossify. While the shape and positioning of the ribs can change, most babies will naturally transition to a more typical ribcage shape by the end of their first year.

? Why is my baby’s posture different from an adult’s?
Babies have a unique anatomy compared to adults. Their spines are more C-shaped, lacking the natural curves adults have. As they start crawling and walking, the spine begins to develop its natural curves. It’s essential to provide them with ample tummy time, which helps in muscle development and achieving a proper posture.

? What are some other bone-related milestones to watch for in my baby?

• Teething: Usually begins around 6 months.
• Sitting up without support: This often occurs between 4-7 months.
• Crawling: Typically starts between 7-10 months.
• Standing with support: Around 9-12 months.
• Walking: Generally between 9-15 months.
• Remember, each baby is unique and may hit these milestones at their own pace.

?‍⚕️ Why do doctors measure the baby’s length and not height?
Until a baby can stand on their own, it’s more accurate to measure their length while they lie down. Once they’re capable of standing, usually around their first birthday, doctors will start recording their height.

☀️ Besides sunlight, how can I ensure my baby gets enough Vitamin D?
Diet plays a pivotal role. Foods like fatty fish (salmon, mackerel), egg yolks, and fortified foods like some cereals and dairy products can provide Vitamin D. Additionally, Vitamin D supplements, often recommended by pediatricians, can be a helpful addition, especially in areas with limited sunlight.

? How can I tell if my baby is getting enough nutrients?
Watch for regular weight gain, consistent wet diapers, and a general content demeanor post-feedings. A baby who’s alert, active, and reaches developmental milestones is typically well-nourished. However, if you’re concerned about your baby’s nutrition, always consult a pediatrician.

? Are there other signs of Vitamin D deficiency in babies?
Yes, besides ribcage deformities, symptoms can include muscle weakness, pain, delayed motor skills, and frequent infections. If you notice these signs, it’s crucial to consult with a healthcare professional.

? When transitioning to solid foods, which ones promote good bone health?
When introducing solids, prioritize foods rich in calcium and Vitamin D. Options include:

• Pureed greens like spinach and kale.
• Soft, cooked bones from fish.
• Calcium-fortified cereals.
• Full-fat yogurts and cheeses.

? Are there skin products that might inhibit Vitamin D absorption?
Interestingly, sunscreens, while essential for preventing sunburns, can reduce Vitamin D synthesis when applied. However, the benefits of protecting your baby’s skin from harmful UV rays outweigh the potential reduction in Vitamin D production. Just ensure they get a balanced diet to compensate.

? How does a baby’s sleeping position affect their ribcage development?
While sleeping position doesn’t directly influence ribcage development, it’s recommended that babies sleep on their backs to reduce the risk of Sudden Infant Death Syndrome (SIDS). This position won’t hinder the ribcage’s natural development.

? What’s the best way to support my baby’s spine and ribs while carrying them?
When carrying or using a baby carrier, ensure it provides ample support to the baby’s back, neck, and head. The baby’s legs should be in a frog-like position, and their back should be C-curved. Proper support ensures that there’s no undue pressure on the baby’s developing spine and ribs.

? Can baby-led weaning influence bone development?
Baby-led weaning, where babies are encouraged to feed themselves, can have indirect effects. Chewing and gnawing on harder foods can stimulate jawbone development. Always monitor your baby during this process to prevent choking.

? Is it safe for babies to play on their tummy?
Absolutely! Tummy time is encouraged as it strengthens neck, back, and shoulder muscles, supporting good posture and spinal health. However, always supervise your baby during tummy time and ensure it’s on a flat, safe surface.

? Do flat feet in babies indicate bone issues?
No need to panic! Most babies are born with flat feet, and their arches develop as they grow. By the time they’re 6 or 7, most children have visible arches. If you’re concerned, a pediatric orthopedic specialist can provide insights.

? Can other vitamin deficiencies affect bone health in babies?
Yes! Vitamin C is essential for collagen formation, a protein that aids in the formation of bones, cartilage, blood vessels, and skin. A deficiency can lead to scurvy, which can affect bone health. It’s rare, but ensure your baby gets a well-rounded diet to avoid any nutritional gaps.