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Highlights this week

Translucent skin

Your baby's blood vessels are visible through his thin skin, and there's no baby fat yet to plump him up.

Sleep on your side

Avoid lying flat on your back now. Your growing uterus compresses major blood vessels, decreasing blood flow to your baby.

Safe exercise tips

Keep moving: Standing still – while doing yoga poses, for example – can lower your blood pressure and make you dizzy. 

17 weeks is how many months?

You're in your fourth month!

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Baby development at 17 weeks

Dem bones

Your baby's skeleton is changing from soft cartilage to bone.


The umbilical cord – her lifeline to the placenta – is growing stronger and thicker.

No sweat

Sweat glands are starting to develop.

baby with thickening umbilical cord
Your baby at 17 weeks Tap the plus for more details
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Your baby is about the size of a turnip

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head to bottom
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Pregnancy symptoms during week 17


Starting to feel a bit off balance? As your belly grows, your center of gravity changes, so you may begin to occasionally feel a little unsteady on your feet. Try to avoid situations with a high risk of falling. Wear low-heeled shoes to reduce your risk of taking a tumble; trauma to your abdomen could be dangerous for you and your baby.

Dry eyes

You may also notice your eyes becoming drier. Using over-the-counter lubricating drops may help. If your contact lenses become uncomfortable, try wearing them for shorter stretches of time. If you still have discomfort, switch to glasses until after you give birth.

Don't see your symptom?
Wondering about a symptom you have? Find it on our pregnancy symptoms page.

baby in body at 17 weeks
Your body at 17 weeks Tap the plus for more details

Pregnancy checklist at 17 weeks pregnant

Learn some relaxation techniques

Deep breathing, guided imagery, prenatal yoga, and progressive muscle relaxation can help you stay on an even keel – and sleep better.

Jot down your crazy pregnancy dreams

You may find that your dream life gets extra weird during pregnancy. (Thanks, pregnancy hormones!) It's worth writing some of your wildest ones down.

17 weeks pregnant bellies

This week's video


BabyCenter's editorial team is committed to providing the most helpful and trustworthy pregnancy and parenting information in the world. When creating and updating content, we rely on credible sources: respected health organizations, professional groups of doctors and other experts, and published studies in peer-reviewed journals. We believe you should always know the source of the information you're seeing. Learn more about our editorial and medical review policies.

ACOG. 2015. FAQ156. Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Patients/FAQs/Prenatal-Development-How-Your-Baby-Grows-During-Pregnancy#one [Accessed May 2019]

Garfield P. 1991. Women’s Bodies, Women’s Dreams. New York, NY: Ballantine Books. [Accessed May 2019]

March of Dimes. 2014. Seat belts during pregnancy. http://www.marchofdimes.org/pregnancy/seatbelts-during-pregnancy.aspx [Accessed May 2019]

Mayo Clinic. 2015. Fetal development: The 2nd trimester. http://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/fetal-development/art-20046151 [Accessed May 2019]

MedlinePlus (ADAM). 2015. Fetal development. https://www.nlm.nih.gov/medlineplus/ency/article/002398.htm [Accessed May 2019]

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Kate Marple is a writer and editor who specializes in health, pregnancy, and parenting content. She's passionate about translating complicated medical information into helpful pregnancy and parenting advice that's easy to understand. She lives in San Francisco with her family.
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