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Highlights this week

The kicks are coming

You'll probably start feeling your baby move between 16 and 22 weeks, most likely when you're sitting or lying quietly.

How much alcohol is safe?

Experts say none. Even the smallest amount of alcohol may have harmful effects on a developing baby.

Plan your last hurrah

"Feeling weightless while floating in the water was the best!" Babymoon tips from our readers.

16 weeks is how many months?

You're in your fourth month!

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Baby development at 16 weeks

Growth spurt

In the next few weeks, your baby will double his weight and add inches to his length. His legs are much more developed, and his head is more erect.

Scalp pattern

The patterning of your baby's scalp has begun, though his locks aren't recognizable yet.

Heart at work

Your baby's heart is now pumping about 25 quarts of blood each day, and this amount will continue to increase as your baby develops.

See what fraternal twins look like in the womb this week.

baby with hair pattern forming on scalp
Your baby at 16 weeks Tap the plus for more details
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Your baby is about the size of an avocado

4 ½
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head to bottom
3 ½
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Pregnancy symptoms during week 16

Growing uterus

The top of your uterus is about halfway between your pubic bone and your navel, and the round ligaments that support it are thickening and stretching as it grows.

Feeling better?

Less nausea, fewer mood swings, and "glowing" skin contribute to an overall sense of well-being.

Baby kicks?

Soon you'll be feeling your baby move. While some women notice "quickening" this early, most don't feel their baby move until 18 weeks or more. (If this is your first baby, you may not feel movements until 20 weeks or so.) The first movements may feel like little flutters, gas bubbles, or even like popcorn popping, but they'll grow stronger and more frequent.

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

baby in womb with ligaments of uterus thickening at 16 weeks
Your body at 16 weeks Tap the plus for more details

Pregnancy checklist at 16 weeks pregnant

Track your weight gain

Your caregiver will monitor your weight to make sure you're in a healthy range and gaining at a good pace. You can also use our pregnancy weight gain calculator to stay on track.

Start a baby names list

Here's a good way to make a baby names list you and your partner can live with: Make a list of ten names you like. Have your partner do the same. Trade lists and take turns crossing off names you don't love until you (hopefully) have some in common.

Talk to your baby

Though you can't have a face-to-face chat yet, talking to your baby is a great way to start the bonding process. If having an actual conversation seems odd to you, narrate your activities, read out loud, or share your secret wishes for your child.

16 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]

ACOG. 2013 (reaffirmed 2015). Committee opinion 548: Weight gain during pregnancy. American College of Obstetricians and Gynecologists. http://www.acog.org/Resources-And-Publications/Committee-Opinions/Committee-on-Obstetric-Practice/Weight-Gain-During-Pregnancy [Accessed May 2019]

CDC. 2016. Weight gain during pregnancy. U.S. Centers for Disease Control and Prevention. http://www.cdc.gov/reproductivehealth/maternalinfanthealth/pregnancy-weight-gain.htm [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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