3 Months Pregnant: What to Expect During Pregnancy

3 Months Pregnant: What to Expect During Pregnancy

Your pregnancy week by week

You’re 3 months pregnant — congratulations! This is an important milestone. Let’s take a look at what it means to be at the end of your first trimester.
At 3 months pregnant, you’re in the last month of your first trimester!

This is an exciting time because your little embryo has now officially become a fetus.

This means all of their internal organs, muscles, and bones are in place.
(Isn’t that incredible?)

So while there’s still a lot of growing to be done, the groundwork is there.

Got some questions?

Sure, you do!

Let’s answer them for you.

In this article: 📝

  • How many weeks is 3 months pregnant?
  • Is it possible to get a false negative pregnancy test at 3 months?
  • What should I be feeling at 3 months pregnant?
  • Can your belly show at 3 months pregnant?
  • Can you feel the baby at 3 months?
  • How large is a 3 month old fetus?
  • What does a baby do at 3 months in the womb?
  • Things to think about
  • 3 months pregnant: the bottom line

How many weeks is 3 months pregnant?

Most pregnancies are about 40 weeks long (though they can be both longer and shorter — every pregnancy is different).

This makes dividing a pregnancy into months kinda tricky.

On average, being 3 months pregnant usually means that you’re between 9 and 12 weeks into your pregnancy.

Sometimes, this extends to 13 weeks.

At the end of this month, you’re a third of the way toward meeting your baby!

Is it possible to get a false negative pregnancy test at 3 months?

This is a bit of a weird one.

Technically, yes, you can get a 3 months pregnant negative pregnancy test and still be pregnant.

It’s rare, but it does happen.

Getting a false negative result at this stage is often a result of something known as the hook effect.

It’s when a pregnancy test detects too much of the hCG hormone in your urine.

You’ve got too much hCG and you’re negative!?

Yeah, we know, it’s weird.


It just means that the levels of hCG overwhelm the antigen:antibody ratio in the test, and you get the wrong result.

If you think you might be pregnant but your urine tests are still coming back negative, a blood test with your doctor will let you know for sure.

What should I be feeling at 3 months pregnant?

Here are some common 3 months pregnant symptoms (remember that you might not experience them all):

Pregnancy nausea

Hopefully, this will be starting to ease during your third month, and ideally it won’t be around much longer at all.

Some nausea is still very normal, unfortunately.


Still feeling worn out?

That’s par for the course, too.

If possible, listen to your body when it tells you to rest, and try some light to moderate exercise if you can.

This might sound counterintuitive, but doing some exercise is likely to make you sleep better and, in turn, feel more rested.

Vaginal discharge

You’re likely to have slightly more vaginal discharge than normal around this time.

Don’t worry, it’s just your pregnancy hormones doing their thing.

If it’s clear or whitish and doesn’t have a bad smell, it’s nothing to worry about.

Fabulous hair


This is what you’ve been waiting for.

Around 3 months, you may start noticing that your hair is thicker, shinier, and healthier than it’s ever looked.

Maybe those pregnancy hormones aren’t all bad.

Scrambled eggs for brains

Pregnancy brain is a thing.

And around the 3-month mark is when you’re likely to notice it the most.

Changes to your breasts

Darker areolas?

Protruding nipples?

Yep, pregnancy often causes obvious changes to your breasts.

They’re slowly getting ready to feed your baby.


Constipation is a common side effect around this time, and it’s likely that both your pregnancy hormones and prenatal vitamins are at fault.

Try and deal with this one by upping your fiber intake: lots of fresh fruits, veggies and whole grains are the way to go.

Can your belly show at 3 months pregnant?

We know you’re desperate to announce your baby to the world, but usually, 3 months is still a little early to show off a bump, especially if this is your first pregnancy.

When you show varies a lot from pregnancy to pregnancy and tends to depend on whether you’ve been pregnant before, and your weight, height, and core strength.

Typically, baby bumps start to show at around 16–20 weeks.

But if your 3 months pregnant belly is already starting to become a proper baby bump, that’s normal, too.

Start shopping for some new maternity clothes and enjoy it, mama!

Can you feel the baby at 3 months?

We know that this is another big milestone you’re looking forward to, but it’s very unlikely that you’ll feel your baby move just yet.

Fetal movement is usually only noticeable between weeks 16 and 25.

Another month or so, and you’ll be receiving regular jabs and punches from that little kickboxer inside of you.

How large is a 3 month old fetus?

Towards the end of your first trimester, at about 12 weeks, your baby is about the size of a lemon. 🍋

Hopefully you’ll see a nice clear image of your peanut at your 3 months pregnant ultrasound, which usually happens somewhere between 8 and 14 weeks.

What does a baby do at 3 months in the womb?

Your 3 months pregnant fetus is up to all sorts of things right now:

  • Their fingers and toes are starting to form, as are their skin and nails.
  • Their sex organs are developing, too.
  • Their little bones are starting to harden, except for their backbone — that one’s still soft.
  • Believe it or not, one of the things your baby is doing a lot right now is squinting. (Yes, that’s right, they’re putting those facial muscles to the test.)
  • Their kidneys are also starting to make urine, and their sweat glands are starting to form.
  • They might also be sucking their thumb and hiccuping.
  • The memory and problem-solving parts of their brain are developing. 🤯

Curious about what happens after this?

We’ve got the definitive guide to your second trimester right here.

Things to think about

The 3-month mark is quite a milestone.

Your chances of pregnancy loss is a lot lower after this time.

This means that it’s a good time to start thinking about a few other aspects of this exciting journey:

Run any other necessary tests

Given your personal or medical history, are there any tests that your doctor recommends? Speak to them if you have any concerns or questions.

Share the news

If you haven’t told friends or family yet, now might be a good time.

But this is a very personal decision, and it’s entirely up to you who you tell — and when.

Look into maternity leave

Does your company have a maternity policy in place?

Is there a particular point at which you need to let them know about your pregnancy so that you can apply for maternity leave?

Speak to your HR department if you need some answers.

Chat with your partner

Pregnancy is a big deal, and brings up different emotions at different times.

If you’re navigating it with a partner, keep chatting!

Are you talking about how you’re feeling?

Are they sharing their thoughts?

Make sure to touch base from time to time.

3 months pregnant: the bottom line

Well done on getting through your first trimester.

From here on, things are likely to get easier in some ways (that nausea should pass! 🤞) and a lot more real in others (your baby bump is on its way 🤰).

We’re with you every step of the way.

Just reach out to our Peanut community if you need some help.

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