Dizziness during pregnancy often kicks in at around week 17 in the second trimester. Blame hormones, your growing uterus and a rapidly expanding circulatory system.

Meanwhile, your little one is learning to suck and swallow, and is also starting to develop fingerprints.

Your Baby at Week 17

At a Glance

Getting ready to feed
Getting ready to feed
Your little one is practicing sucking and swallowing as he gets ready for the real thing: a breast or bottle!
Baby will soon be able to hear you!
Baby will soon be able to hear you!
Baby's sense of hearing is making big strides this week. His ears are close to being fully formed and he's starting to be able to hear your voice.
Warming up
Warming up
Fat stores are beginning to develop under your baby's skin. This provides energy and will help keep your little one warm (and cute) after birth.

17 weeks pregnant is how many months?

If you're 17 weeks pregnant, you're in month 4 of your pregnancy. Only 5 months left to go! Still have questions? Here's some more information on how weeks, months and trimesters are broken down in pregnancy.

How big is my baby at 17 weeks?

My, how your baby has grown! Your little one weighs about 5 or more ounces and is the size of your palm, or around 5 inches long. Body fat (baby's, that is) is beginning to form and will continue to accumulate through the end of your pregnancy — join the club, baby!

Baby's practicing sucking and swallowing

Since practice makes perfect, your baby is sharpening his sucking and swallowing skills in preparation for that first and second…and third suckle at your breast or the bottle. 

In fact, most of the survival reflexes your baby will have at birth are being perfected in utero right now.

Fingerprints are forming

Here's some proof that your baby is truly one of a kind — as if you needed any! Within the next week or so, the pads on your baby's fingertips and toes will become adorned with completely individual swirls and creases, aka fingerprints.

Fetal cardiac activity is more regular

Baby's heart is now regulated by the brain, so no more random beats, and is churning out 140 to 150 beats per minute — about twice as fast as yours.

Your Body at Week 17

17 weeks pregnant woman

Here come the tummy touchers!

Now that you're starting to show, chances are that friends, coworkers and even strangers may feel the urge to reach out and touch your tummy. If you don't mind, that's fine. But if you do, speak up kindly but firmly.

Your growing appetite

Remember when you were so queasy you could barely stomach ginger ale and a cracker? Happily, your toilet-hugging days and nights are probably over. And happily, these days it's more likely that you can't get enough to eat.

For most women, the second trimester not only brings relief from morning sickness but also a hearty appetite. Don't be surprised if you suddenly feel hungry enough to polish off a sizable cut of steak or a whole tray of baked ziti at 17 weeks pregnant.

What's behind your increase in appetite? Simple — you're taking signals from your baby, who's getting bigger and hungrier. Not sure exactly how much weight you should gain during pregnancy? Talk to your practitioner, who will be able to help you maintain a healthy weight gain. Your doctor or midwife can also help you play weight gain catch-up if you didn't gain enough or lost weight during the first trimester. 

Stop snoring

One inexplicable pregnancy symptom? Snoring! But take heart: The stuffiness that often triggers world-champion snoring is common — and temporary. That's right, even your nose is affected by pregnancy hormones!

Try putting a humidifier in your bedroom, using one of those nasal strips on your nose to open up your nasal passages, or sleeping on a couple of pillows to keep your head slightly elevated. And if your partner complains? Banish your sweetie to the sofa for the night — it's more important that you get a good night's sleep.

Heightened symptoms

More new developments with your body may be on tap this week: an increase in vaginal discharge (leukorrhea) and a greater sensitivity to allergens. Both are totally normal!

Pregnancy Symptoms Week 17

Increased appetite
Increased appetite
Stretch marks
Stretch marks
Occasional headaches
Occasional headaches
Faintness or dizziness
Faintness or dizziness
Heartburn and indigestion
Heartburn and indigestion
Backaches
Backaches

Tips for You This Week

Choose soups

No matter the season, soups make a great midday meal. They can be as hearty as you want, pair well with others — we’re looking at you, sandwiches — and are often full of protein and fiber.

Eat em’ cold or eat em’ hot, and make a double batch of soup so you can freeze some for another time.

Stretch to prevent sciatica

The sciatic nerve, the largest in the body, starts in the lower back, runs down the buttocks, and branches down the back of the legs to the ankles and feet.

In most cases, sciatica — sharp, shooting pain, tingling or numbness that starts in the back or buttocks and radiates all the way down the legs — happens when this nerve gets compressed by bulging, slipped, or ruptured discs.

Arthritis and a narrowing of the spinal canal, also called spinal stenosis, can also be culprits. Try a heating pad or back stretches to ease the pain.

Time for the Tooth Fairy again?

Have you noticed a mildly looser tooth that suddenly makes you feel like you’re back in elementary school?

Hormones can affect the gums, ligaments and bones in your mouth, which in turn can slightly loosen the teeth, especially if you have more serious untreated conditions like gingivitis or periodontitis.

See the dentist as soon as possible if you notice a very loose tooth or have other significant dental issues. And be sure to keep up with twice-daily brushing, regular flossing and other important oral hygiene practices during pregnancy.

Ease round ligament pain

Your uterus is supported by thick bands (called ligaments) that run from the groin up the side of the abdomen.

As your uterus grows during pregnancy, these bands stretch out to accommodate your growing bump — which can cause sharp pains and dull aches in the lower abdomen.

To relieve round ligament pain, make sure to spend time off your feet and decrease the intensity of your workouts. You can also consider wearing a belly band for a little extra support.

Stay out of the sun

Seeing spots — on your face? A line down your lower belly? Skin tags dotting your upper arms?

No need to dash to the dermatologist. These strange skin symptoms, including darkening moles and heat rashes, are all normal and temporary. As usual, hormones are to blame, but the sun can exacerbate these changes in your complexion.

So stay shaded whenever you can — now's the time to invest in a wide-brimmed hat — and apply a broad spectrum sunscreen with an SPF of 30 or higher when you venture out in the daylight. Sunscreen is safe and smart to use when you're expecting. Ask your doctor about anything you’re concerned about.

Don’t stand up too quickly

During pregnancy, progesterone increases the flow of blood to your baby, resulting in lower blood pressure and reduced blood flow to your brain — giving you that faint feeling all over.

To help stave off dizziness, always stand up from a sitting or lying position slowly.

Sensitive to dairy?

If milk or other dairy products aren't your thing, you'll have to cash in on calcium a different way. Luckily, dairy products aren't the only sources of calcium — they're just the most well-known.

Calcium-fortified orange juice and other fruit juices can offer about as much of the vital nutrient as milk, cup for cup. For additional non-dairy dietary sources of calcium, turn to leafy green vegetables, sesame seeds, almonds and calcium-fortified soy products like tofu.

Still concerned you're not getting enough? Ask your practitioner whether you should take a calcium supplement for extra insurance.

From the What to Expect editorial team and Heidi Murkoff, author of What to Expect When You're Expecting. What to Expect follows strict reporting guidelines and uses only credible sources, such as peer-reviewed studies, academic research institutions and highly respected health organizations. Learn how we keep our content accurate and up-to-date by reading our medical review and editorial policy.

  1. What to Expect When You’re Expecting, 5th edition, Heidi Murkoff.
  2. WhatToExpect.com, Snoring During Pregnancy, March 2021.
  3. WhatToExpect.com, What Sunscreen Is Safe During Pregnancy?, April 2021.
  4. WhatToExpect.com, Palmar Erythema During Pregnancy, November 2022.
  5. WhatToExpect.com, How Much Calcium Do You Need During Pregnancy?, June 2022.
  6. WhatToExpect.com, Sciatica During Pregnancy, November 2022.
  7. WhatToExpect.com, Round Ligament Pain During Pregnancy, May 2023.
  8. National Institutes of Health, National Library of Medicine, Fetal Development, July 2021.
  9. Mayo Clinic, Fetal Development: The 2nd Trimester, June 2022.
  10. Johns Hopkins Medicine, The Second Trimester, August 2021.
  11. National Institutes of Health, National Library of Medicine, Snoring, August 2016.
  12. National Institutes of Health, National Library of Medicine, Sciatica, March 2016.
  13. American College of Rheumatology, Spinal Stenosis, February 2023.
  14. Journal of the American Dental Association, Dental Care During Pregnancy, November 2018.
  15. National Institutes of Health, Office of Dietary Supplements, Calcium, October 2022.
  16. American College of Obstetricians and Gynecologists, Exercise During Pregnancy, March 2022.
  17. American College of Obstetricians and Gynecologists, Skin Conditions During Pregnancy, July 2022.
  18. American Academy of Dermatology, Sunscreen FAQs, October 2023.
  19. WhatToExpect.com, Dizziness During Pregnancy, September 2022.
  20. WhatToExpect.com, How Many Weeks, Months and Trimesters in a Pregnancy?, May 2022.
  21. WhatToExpect.com, Pregnancy Weight Gain Calculator, August 2022.
  22. WhatToExpect.com, Vaginal Discharge During Pregnancy (Leukorrhea), January 2022.
  23. WhatToExpect.com, Pregnancy-Safe and Family-Friendly Recipes.
  24. WhatToExpect.com, Can You Go to the Dentist When You're Pregnant? What to Know About Oral Health and Pregnancy, September 2021.
  25. WhatToExpect.com, Best Pregnancy Belly Support Bands, According to Moms-to-Be, August 2023.
  26. WhatToExpect.com, Skin Darkening and Discoloration During Pregnancy, November 2022.
  27. WhatToExpect.com, Has Your Appetite Increased During Pregnancy?, December 2022.
  28. WhatToExpect.com, Stretch Marks During and After Pregnancy, April 2021.
  29. WhatToExpect.com, Headaches During Pregnancy, July 2021.
  30. WhatToExpect.com, Heartburn During Pregnancy, October 2022.
  31. WhatToExpect.com, Back Pain During Pregnancy, January 2022.

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