Pregnancy Week 23

Your baby weighs just over a pound this week! Find out what's going on with her as well as how to tame junk food cravings, beat back pain, and more.

Week by week baby size image. Week by week baby size image.

How big is baby?

Your baby is as big as a sweet potato. His brain and hearing are more developed this week, and he's beginning to recognize your voice.

Baby's Length: 11.38in.
Baby's Weight: 1.10lb.
Fetus at Week 23 What the baby looks like at week 23 of fetal development. Med ART Studios Explore More

Baby's Development

Billions of brain cells will develop in your baby's brain over the next couple of weeks. These will control all of your baby's movements and sensory, and basic life functions like breathing. Also around this time, some major changes are happening with your baby's lungs. Surfactant is being produced, a substance that enables the air sacs to inflate and the lungs to fully expand. Right now he's still breathing amniotic fluid, but when he's born he'll be ready for air.

Baby Week 23

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Weighing about 1 full pound, your developing fetus is about the size of a mango.Most of the fetal internal organs are now in place and beginning to function well.Taste buds have formed but your developing fetus won't taste anything for several more months.
Week by week baby ultrasound image. Week by week baby ultrasound image. American Institute of Ultrasound in Medicine - AIUM.org

Week 23 Ultrasound

With the baby-to-be crouched and his legs pulled in toward his chest, you can almost see his complete profile. Images of the baby's entire body are difficult now that he's more than 8 inches in length. He's about to experience a dramatic weight gain in the coming weeks. For now, he's still relatively thin.

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Watch Baby's Growth

Developing Senses: Weeks 22 to 25 of Pregnancy

Mom's changing body

That baby of yours sure needs a lot of nutrients. As she uses more and more of the vitamins and minerals passing through your body, you might need an extra dose. That's why doctors sometimes prescribe iron supplements, in addition to your prenatal vitamin, during the second half of pregnancy. The extra boost may help reduce your risk of anemia, a condition in which your body doesn't get the 30 milligrams of iron it needs every day to produce enough red blood cells; this can trigger symptoms like serious fatigue, weakness, shortness of breath, and dizziness. Contact your doctor right away if you feel any of those symptoms during your second or third trimesters. Anemia won't harm the baby in most cases, but it can really zap your energy levels. The good news, though, is that it's usually easily treatable with a daily supplement.

Weekly Tip

If upper back pain is your biggest complaint, you may be able to solve the problem with a new, more supportive bra. Some women have trouble adapting to the weight of growing breasts.

Pregnancy Confidential Podcast

Dad Talk: What Kind of Father Will He Be, Really?

By the time Week 23 rolls around, you've had a lot of time to think about parenthood, and what it means to have a real live baby on the way. You might have planned your nursery, and thought about parenting styles (which you may or may not stick to when reality hits), and you might have spent a moment or two considering your partner and what kind of parent he (or she) will be. Sure you love them—that's why you're in this pregnancy situation—but what will they be like when there's the pitter patter to think about?

This Week's To-Do List

Must-Reads

The Dangers of Gaining Too Much Weight During Pregnancy

Learn why too many pregnancy pounds could be risky for you and your baby.

15 Hysterical Mommy-to-Be Meltdowns

Pregnancy hormones can do a number on your emotions, and the highs and lows you experience can be downright dramatic -- you may cry for an hour because your hubby ate all the Ben & Jerry's. Here, real moms share their funniest flip-outs.

The Inside Story: Your Baby in Week Twenty-Three

Your baby is walking around your belly a lot this week, and her eyes may even flutter open occasionally.

Is Circumcision Right for Your Family?

If your baby is a boy, you'll need to determine if he'll have this surgery. Knowing the latest health info can help you make an informed choice.

Your Developing Baby: Week 23

What's going on with your baby in pregnancy week 23? Find out all about important pregnancy milestones and exciting fetal development specific to this week of pregnancy!

Developing Senses: Weeks 22 to 25 of Pregnancy

Your baby's ability to see, hear, smell, taste, and feel are developing stronger each day. Learn which of her senses are already working.