What is the fourth trimester? Your guide to adjusting for you + your baby

In the fourth trimester, your baby is going through a massive environment transition.


The world of pregnancy is often split into three separate stages: The first trimester, the second trimester and the third trimester.

After that, you zip off to the hospital or birth center (or a room for your home birth,) and after several grueling hours, you give birth to your sweet little angel. You're taught a few educational lessons by your nurse or doula, handed your swaddled baby, patted on the head, and sent on your merry way feeling both excited and terrified.

While most people only consider childbirth to have three trimesters, we've come to find there is another trimester most people don't know about—it's called the "fourth trimester."


The fourth trimester is comprised of a few essential components and phases, and we're giving you tips on how to best transition yourself and your baby through this next stage.

What exactly is the fourth trimester?

The fourth trimester is the first three months after birth.

Your baby spent nine months in the comfortable home of your belly and is now a tiny little thing in a great big world. So, let's focus on two separate ideas: How to help your baby accommodate during the first three months of their life, and how to heal your body during these next three months of recovery.

The baby's fourth trimester

In the fourth trimester, your baby is going through a massive environment transition.

During the nine months of pregnancy, your baby was cradled in its amniotic sac and fluid. Now that they're here in the world, that environment is gone—and that takes some getting used to.

To help your newborn transition into this new environment in the fourth trimester, you can recreate feelings of their 'prior home.'

Recreating your baby's belly bungalow doesn't mean sticking your baby in a bath 24/7, but it does mean we can evoke the same comfort and security our baby was used to feeling in the womb.

Here are two ways to help your baby transition to their new environment:

1. Skin-to-skin contact

Immediately after birth, we are hopefully handed our babies and told to place them on our bare skin. This skin-to-skin contact calms the baby with our skin's warmth and familiarizes our baby with the smell of our skin and the sound of our voice.

2. Swaddling

Babies are used to being enveloped by fluid and your snug uterus, so having to adjust to this open space we call the world is a drastic change. Swaddling the baby in a cloth can help the baby feel as if they have more security. It is important to learn the proper technique for swaddling, so your baby feels comforted but not restricted. Ask your nurse to show you before you leave your birthplace, or try a swaddle device that helps take some of the guesswork out of it.

Your baby's development during the fourth trimester

During the first three months postpartum, your baby will be experiencing a ton of change. This change is often expressed in three ways: crying, sleeping and eating. Knowing what you can anticipate during your baby's fourth trimester will better equip you on how to handle their changes.

Here are four newborn developmental changes to anticipate during the fourth trimester:

1. Crying

Crying is said to escalate around five to six weeks and typically lessens around three months. Keep in mind that crying is your baby's only form of communication. Although you should keep an eye out to make sure nothing is significantly wrong with the baby (and remember to call your pediatrician for any questions), you can also take comfort in knowing that your newborn will cry a lot in the fourth trimester.

2. Sleeping

Babies all vary in their sleep schedules. In the first two months, babies are not able to tell the difference between day and night. During the first week, babies will typically sleep 16-18 hours throughout the day, and as they get older, they will lessen the amount of time they need to sleep.

3. Eating

Newborns typically feed once every two to three hours because their stomachs are small and digest quickly. Over the course of time, your baby will feed less frequently because their stomachs will grow and will be able to stay fuller for a longer duration of time.

4. Senses

In the womb, your baby develops their senses, but everything is a bit muted. But during the fourth trimester, their senses start to sharpen.

  • Vision: At birth, your baby's vision is blurred. As time goes on, your baby will slowly open their eyes more and start to recognize shapes until they are fully able to see. Take note of your baby's alertness. As your baby gets older, they will look around more and place focus on different things they are able to recognize.
  • Smell: We are often told to hold our baby against our bare skin during the fourth trimester to accustom our baby to our smell. This especially comes into play if you choose to breastfeed your baby. When it's time to feed, even if our baby can't see fully, they are able to recognize our scent and can search for the breast to begin feeding.
  • Hearing: It turns out that playing classical music for your baby in the womb wasn't a moot effort! Your baby is able to hear during pregnancy and has vaguely familiarized themselves with the sound of our voice. After delivery, your baby is introduced to a world full of sounds. Crying may occur if the baby is overwhelmed with senses, especially sound. Although we don't need to keep our baby in a chamber of silence, we should be aware of the surrounding noise to keep our baby comfortable.

Mama's fourth trimester

Talk about massive transitions. While your baby is adjusting to being in this world, you are adjusting to being a mother! Here is what you can anticipate and how to help yourself through this massive transformation.

Physical transition

The changes your body endures during pregnancy are nothing short of a miracle. The mere fact that women's bellies expand in order to house their little cohabitant is astounding. But these changes and the physical endurance we need to give birth take a serious toll on our bodies. For mothers, the fourth trimester should be dedicated to the physical recovery of your body.

Pelvic floor therapists specialize in helping women assess and strengthen their abdomen and pelvic region after birth. While typically, the human body is resilient and returns to its former functionality, sometimes, this restoration period doesn't happen quite as seamlessly as we'd like it. If you are experiencing incontinence, instability or back pain, these may all be signs that your pelvic region needs to be examined.

The same thing goes for your abdomen.

During pregnancy, the tissues expand, and after delivery, these tissues will typically return to their normal location. However, in certain cases, diastasis recti, or a separation in the abdomen tissues, will leave you with a protruding belly. If, after several months post-delivery, you still have a larger-than-normal belly, seek out a pelvic floor therapist or women's health provider and have them measure the width of separation occurring in your abdominal region. They should be able to tell you what is normal or not and recommend exercises and massages for more efficient recovery.

Postpartum nutrition

The fourth trimester should be a time when mothers focus on the healing of their bodies through proper diet and nutrition. As we've discussed, the process of pregnancy and giving birth is extremely taxing, and while our focus usually defaults to our newborn during this time, we also need to make ourselves a priority, especially when it comes to nutrition.

During the fourth trimester, mothers should emphasize the following three aspects of their nutrition:

1. Boosting serotonin

Postpartum depression is the most susceptible during the fourth trimester because your body is trying to rebalance its hormones and is likely sleep-deprived. There are some foods that are believed to naturally boost your serotonin levels by incorporating foods that contain tryptophan and vitamin B6 into your diet. Foods like eggs (specifically the yolks), salmon, pineapple, tofu, turkey, and nuts can all naturally help you feel happier and more energized. This being said, if you have any concerns about your mental health, seek medical treatment or therapy right away.

2. Regulating the digestive system

Unfortunately, constipation and hemorrhoids are common during the fourth trimester. To regulate your digestion, stay hydrated and eat enough fiber. Foods like flaxseed, berries, oatmeal, ripe bananas, and fermented foods (like yogurt, kimchi, and sauerkraut) can help regulate the digestive tract.

3. Finding a wholesome nutrition supplement

During the fourth trimester, healing our bodies through the vitamins, minerals and nutrients, we receive through food is essential. During birth, women have significant blood loss, which is why maintaining healthy levels of iron is so important. Having efficient protein is also a must in order to rebuild our muscles and overall strength. A good way to ensure we reach our daily nutrition is to find a clean, healthy nutritional supplement. You should keep taking your prenatal vitamin, and consider speaking with your provider about additional recommendations for your specific needs.

I felt lost as a new mother, but babywearing helped me find myself again

I wish someone had told me before how special wearing your baby can be, even when you have no idea how to do it.

My first baby and I were alone in our Brooklyn apartment during a particularly cold spring with yet another day of no plans. My husband was back at work after a mere three weeks of parental leave (what a joke!) and all my friends were busy with their childless lives—which kept them too busy to stop by or check in (making me, at times, feel jealous).

It was another day in which I would wait for baby to fall asleep for nap number one so I could shower and get ready to attempt to get out of the house together to do something, anything really, so I wouldn't feel the walls of the apartment close in on me by the time the second nap rolled around. I would pack all the diapers and toys and pacifiers and pump and bottles into a ginormous stroller that was already too heavy to push without a baby in it .

Then I would spend so much time figuring out where we could go with said stroller, because I wanted to avoid places with steps or narrow doors (I couldn't lift the stroller by myself and I was too embarrassed to ask strangers for help—also hi, New Yorkers, please help new moms when you see them huffing and puffing up the subway stairs, okay?). Then I would obsess about the weather, was it too cold to bring the baby out? And by the time I thought I had our adventure planned, the baby would wake up, I would still be in my PJs and it was time to pump yet again.

Slowly, but surely, and mostly thanks to sleep deprivation and isolation, I began to detest this whole new mom life. I've always been a social butterfly. I moved to New York because I craved that non-stop energy the city has and in the years before having my baby I amassed new friends I made through my daily adventures. I would never stop. I would walk everywhere just to take in the scenery and was always on the move.

Now I had this ball and chain attached to me, I thought, that didn't even allow me to make it out of the door to walk the dog. This sucks, I would think regularly, followed by maybe I'm not meant to be a mom after all.

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14 outdoor toys your kids will want to play with beyond summer

They transition seamlessly for indoor play.

With Labor day weekend in the rearview and back-to-school in full swing, most parents are fresh out of boxes to check on their "Fun Concierge" hit list. It's also the point of diminishing returns on investing in summer-only toys. So with that in mind, we've rounded up some of our favorite toys that are not only built to last but will easily make the transition from outdoor to indoor play. Even better, they're Montessori-friendly and largely open-ended so your kids can get a ton of use out of them.

From sunny backyard afternoons to rainy mornings stuck inside, these toys are sure to keep little ones engaged and entertained.

Meadow ring toss game

Plan Toys meadow ring toss game

Besides offering a fantastic opportunity to hone focus, coordination, determination and taking turns, lawn games are just plain fun. Set them up close together for the littles and spread them out when Mom and Dad get in on the action. With their low profile and rope rings, they're great for indoors as well.


Balance board

Plan Toys balance board

Balance boards are a fabulous way to get the wiggles out. This one comes with a rope attachment, making it suitable for even the youngest wigglers. From practicing their balance and building core strength to working on skills that translate to skateboarding and snowboarding, it's a year-round physical activity that's easy to bring inside and use between Zoom classes, too!


Detective set

Plan Toys detective setDetective Set

This set has everything your little detective needs to solve whatever mystery they might encounter: an eye glasses, walkie-talkie, camera, a red lens, a periscope and a bag. Neighborhood watch? Watch out.


Wooden doll stroller

Janod wooden doll strollerWooden Doll Stroller

Take their charges on a stroll around the block with this classic doll stroller. With the same versatility they're used to in their own ride, this heirloom quality carriage allows their doll or stuffy to face them or face the world.


Sand play set

Plan Toys sand set

Whether you're hitting the beach or the backyard sandbox, this adorable wooden sand set is ready for action. Each scoop has an embossed pattern that's perfect for sand stamping. They're also totally suitable for water play in the wild or the bathtub.


Water play set

Plan Toys water play set

Filled with sand or water, this tabletop sized activity set keeps little ones busy, quiet and happy. (A mama's ideal trifecta 😉). It's big enough to satisfy their play needs but not so big it's going to flood your floors if you bring the fun inside on a rainy day.


Mini golf set

Plan Toys mini golf set

Fore! This mini golf set is lawn and living room ready. Set up a backyard competition or incorporate into homeschooling brain breaks that shift focus and build concentration.


Vintage scooter balance bike

Janod retro scooter balance bike

Pedals are so 2010. Balance bikes are the way to go for learning to ride a bike while skipping the training wheels stage altogether. This impossibly cool retro scooter-style is built to cruise the neighborhood or open indoor space as they're learning.


Wooden rocking pegasus

plan toys wooden rocking pegasus

Your little will be ready to take flight on this fun pegasus. It gently rocks back and forth, but doesn't skimp on safety—its winged saddle, footrests and backrest ensure kids won't fall off whether they're rocking inside or outside.


Croquet set

Plan Toys croquet set

The cutest croquet set we've ever seen! With adorable animal face wooden balls and a canvas bag for easy clean up, it's also crafted to stick around awhile. Round after round, it's great for teaching kiddos math and problem-solving skills as well.


Wooden digital camera

fathers factory wooden digital camera

Kids get the chance to assemble the camera on their own then can adventure anywhere to capture the best moments. With two detachable magnetic lenses, four built-in filters and video recorder, your little photographer can tap into their creativity from summertime to the holidays.


Wooden bulldozer toy

plan toys wooden bulldozer toy

Whether they're digging up sand in the backyad or picking up toys inside, kids can get as creative as they want picking up and moving things around. Even better? Its wooden structure means it's not an eye sore to look at wherever your digger drops it.


Pull-along hippo

janod toys pull along hippo toy

There's just something so fun about a classic pull-along toy and we love that they seamlessly transition between indoor and outdoor play. Crafted from solid cherry and beechwood, it's tough enough to endure outdoor spaces your toddler takes it on.


Baby forest fox ride-on

janod toys baby fox ride on

Toddlers will love zooming around on this fox ride-on, and it's a great transition toy into traditional balance bikes. If you take it for a driveway adventure, simply use a damp cloth to wipe down the wheels before bringing back inside.


We independently select and share the products we love—and may receive a commission if you choose to buy. You've got this.


The American Academy of Pediatrics says that newborns, especially, do not need a bath every day. While parents should make sure the diaper region of a baby is clean, until a baby learns how to crawl around and truly get messy, a daily bath is unnecessary.

So, why do we feel like kids should bathe every day?

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