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What month will my baby be born? How to calculate your due date

Pregnancies last approximately 280 days, which is 40 weeks, which is (sorry) about 10 months—not nine like we always hear.

when will my baby be born

Pretty much every mama out there has found themselves searching the internet for a due date calculator. Whether you are trying to conceive with specific timing in mind, or are already pregnant and curious to know when your little bundle will arrive, thinking about due dates is super exciting.

Here's everything you may be wondering about your baby's due date, mama:


What is a due date?

Due dates have a lot of terminologies, all referring to the same thing. You might hear:

  • Estimated date of delivery (EDD)
  • Estimated date of childbirth (EDC)
  • Estimated date of confinement (EDC) (… wait what? Back in the day, women were confined to a bed or the hospital when they gave birth, hence the word confinement.)
  • Guess day

Whatever phrasing you use, your due date is the day that we estimate your baby will be born on.

How long is pregnancy?

Pregnancies last approximately 280 days, which is 40 weeks, which is (sorry) about 10 months—not nine like we always hear.

  • At 37 weeks, the pregnancy is considered early-term (full-term, but on the early side of it).
  • At 41 weeks, the pregnancy is considered late-term.
  • At 42 weeks, the pregnancy is considered post-term.

When is my due date?

There are a few ways to calculate your due date; the first is based on the first day of your last period (LMP). Here is the formula:

  • Write out your LMP.
  • Subtract three months.
  • Add seven days.

So, say your LMP was on April 10th:

  • Subtracting three months from April brings you to January.
  • Adding seven days to 10 gives you 17.
  • Your due date is January 17th.

You can also use a due date calculator, which can also help if you know the day of intercourse, insemination, or embryo transfer.

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Sweet ways to welcome your most precious addition

Ultrasounds to determine your due date

For a variety of reasons, a lot of women don't know when their last period was (like, a lot… so don't worry if you're not sure, mama!); histories of irregular periods, medications, and plain-old-forgetting are all normal reasons to be unsure.

A transvaginal ultrasound (where a lubricated ultrasound wand is inserted into the vagina) can help to figure out due dates, especially when done in the first trimester. They will measure the size of the embryo, and use the information gathered to determine the due date. As your pregnancy progresses, it becomes harder to calculate the gestational age and size of the fetus with an ultrasound (the bigger they get, the more inaccurate the measurements are).

How accurate are due dates?

In short, not very. In fact, only about 4% of women will give birth on their due date. Most first-time moms will give birth 3-5 days past their due date, and a great many go longer than that still.

Going past your due date can be frustrating. Your provider will discuss all of your options, like waiting for labor to start on its own versus induction with you. (Psst: if that's you, here are seven things to think about when you go past your due date.)

Ultimately, due dates are really exciting to think about—but my recommendation is to try to think of them as an "around date." Instead of saying, "I'm due on May 15th," maybe try, "I'm due sometime in May!"

Mama, your baby will come, and when they do, it will be the most perfect date of all: your baby's birthday!

For all those planner mamas-to-be: Our due date calculator can help you figure out the exact day your baby could be born. Birth coach not included.


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Provided by YourDueDate.com

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In This Article

14 toys that will keep your kids entertained inside *and* outside

They transition seamlessly for indoor play.

With fall 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 outside-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.

Wooden doll stroller

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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.

$120

Detective set

Plan Toys detective 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.

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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.

$30

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.

$100

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.

$40

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.

$121

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.

$100

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.

$45

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.

$179

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.

$100

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.

$33

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.

$88

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!

$75

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.

$30

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Every week, we stock the Motherly Shop with innovative and fresh products from brands we feel good about. We want to be certain you don't miss anything, so to keep you in the loop, we're providing a cheat sheet.

So, what's new this week?

Rae Wellness: Essential daily supplements to help you shine from the inside out

Rae Wellness is a women-led company with the belief that nurturing your mind and body isn't just essential—it's your power. Their collection of daily supplements leverage vegan, non-gmo, high quality ingredients to help you "shine from the inside out." With formulas to designed to fuel your calm, sleep, energy and more, consider them your daily dose of self care, mama. Even better, 5% of every purchase goes directly to Girls. Inc., the non-profit organization that inspires girls to be strong, smart and bold through direct service and advocacy.

Beyond Yoga: Luxuriously soft athleisure you'll want to wear 24/7

Whether you're lounging or lunging, the butter-soft activewear from Beyond Yoga is designed to support women to live fully and confidently. Their thoughtful, California made pieces are crafted with every woman's shape in mind, complementing curves and laying comfortably on all body types.

The Dairy Fairy: Feminine, functional intimates for nursing and pumping mamas

As any mama who has wrestled herself into a less than sexy, over-the-top utilitarian nursing bra knows, it can be quite the demoralizing experience. Add to that the annoyance of having to switch out to a completely different contraption in order to pump hands-free, and it's even more of a let down (pun not necessarily intended.) Frustrated by this all-to-universal dance, founder Emily Ironi made it her mission to create an all-in-one bra that not only works for moms, but celebrates them. Her line of pretty, feminine intimates for nursing and pumping combine function with aesthetics to keep you looking and feeling your best as you rock new motherhood.

Milkful: The Dairy Fairy's size inclusive sister company

Part of the Dairy Fairy's mission was to create a line of nursing and pumping bras that would make women feel comfortable and confident. Since launching in 2012, Emily heard from many women of different shapes and sizes, asking, "why doesn't this come in my size?" Adding sizes to the line didn't quite feel like enough. Instead, she set out to create an entirely new way to support their specific needs during such an important time in their lives. Thus, Milkful's line of size inclusive nursing and pumping intimates was born.

Not sure where to start? Here's what we're adding to our cart:

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Cameron Diaz on having a baby at 47: 'You really have to work hard for it'

"The only pressure for me now is I have to live to be, like, 107, you know? No pressure!"

This is the decade that saw the face of first-time motherhood change. The number of first-time mamas under 30 is shrinking, while more and more women are becoming moms after 40.

Cameron Diaz is one of them. The actress and businesswoman, now 48, became a mom in January at the age of 47. In a new episode of Naomi Campbell's YouTube series, No Filter, Diaz opens up about what it's like to become a mom in your fourth decade.

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