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 an eggplant. Her brain and hearing are more developed this week, and she'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 she's still breathing amniotic fluid, but when she's born she'll be ready for air.

Baby Week 23

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 -

Week 23 Ultrasound

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

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Watch Baby's Growth

What Week 23 of Your Pregnancy is Really Like

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


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.

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.

Week 23 Ultrasound: What It Would Look Like

Now that baby is at 23 weeks, she may be walking around your belly a lot. Find out more about her mobility and other exciting pregnancy milestones at this stage.

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.

What's Wrong with this Nursery?

Baby's domain sure is cute. But is it safe? Try to suss out the 10 trouble spots in this nursery. Then read on to see how you fared.