Pregnancy Week 11

Discover how your baby is developing in week 11 and why you may be experiencing migraines, pelvic pain, and aversions to foods you used to enjoy.

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

How big is baby?

Your baby is about the size of a fig. From now through week 20 of your pregnancy, he'll increase 30-fold in weight and triple in length.

Baby's Length: 1.61in.
Baby's Weight: 0.25oz.
Fetus at Week 11 What the baby looks like at week 11 of fetal development. Med ART Studios Explore More

Baby's Development

Did you know your baby can breathe underwater? She's doing it right now. At weeks 10 and 11, the fetus will start to inhale and exhale small amounts of amniotic fluid, which helps your baby's lungs to grow and develop. Also this week, your baby's ears are scooting up to the sides of his head. Sure, your baby's head is still disproportionally large compared to the rest of his body, but this will even out as he continues to grow and develop in the womb.

Baby Week 11

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At this stage, ovaries in female fetuses (pictured here) contain estrogen receptors which respond to the mothers hormones to help them develop further. Male fetuses begin to make the hormone testosterone. Sexual organs are forming but are not yet distinguishable by ultrasound.Now about the size of a fig, fetal development is in full swing. Arms and legs continue to grow and are able to start bending and moving.The developing fetus is starting to kick. These movements are undetectable by the mother, although they are visible by ultrasound.
Week by week baby ultrasound image. Week by week baby ultrasound image. American Institute of Ultrasound in Medicine - AIUM.org

Week 11 Ultrasound

Baby-to-be is lying on her back with her head on the left side of the image and her legs pointing up. From this image, you can see that her neck is growing, separating her large head from the rest of her body. Her head still makes up more than 50% of her body size, which is normal. Facial bones are again seen as bright white areas in the profile.

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Watch Baby's Growth

Embryo to Fetus: Weeks 9 to 12 of Pregnancy

Mom's changing body

Have you started to show yet? If this is your first pregnancy, you may just feel bloated, kind of like after a big meal. But some women have a little baby-belly pooch by the end of the first trimester. After all, your uterus is now the size of a grapefruit. At your next exam, your doctor will be able to feel the top of it.

Weekly Tip

Hello, cleavage! Spurred by the hormones progesterone and estrogen, your breasts (and the milk-producing glands inside them) may soon strain the buttons of your blouse. In fact, it may soon be time to shop for new bras. If you plan to breastfeed, we suggest heading straight to the nursing section. You'll need the easy access after the baby arrives, so you'll get more wear out nursing bras than you would regular maternity bras.

Pregnancy Confidential Podcast

Pregnancy: The Ultimate Relationship Test?

At 11 weeks, you and your partner are still fairly new to this whole pregnancy thing. And it can take some adjusting. (You won't be the only one with major mood swings over these next few months.) If you're in a relationship, you might be wondering how having a baby will impact your partnership: Will it make it stronger? Will it be a test of your commitment? The truth is, probably both. The tricky thing is a strong, healthy relationship will be more important than ever once a new human being comes along, but it certainly won't always come easy. So now is the time to be proactive about how you're feeling as a duo and try to keep your pack in a happy place—through all the hormones and emotions.

This Week's To-Do List

Must-Reads

Embryo to Fetus: Weeks 9 to 12 of Pregnancy

You're well into your first trimester at this point, and your baby is growing bigger and bigger each day. Watch what it takes for her to become a fetus.

How Big Will Your Pregnancy Breasts Be?

Experts weigh in on how much you can expect your breasts to grow during pregnancy.

The Inside Story: Your Baby in Week Eleven

Your baby is developing a pattern of waking and sleeping. Find out what's going on during your 11th week of pregnancy.

6 Surprising Benefits of Pregnancy

It's not all about back pain and stretch marks! In fact, being pregnant is great for your health.

How to Get More Paid Days During Maternity Leave

Somebody's gonna have to pay for all those diapers!

Your Developing Baby: Week 11

What's going on with your baby in pregnancy week 11? Find out all about important pregnancy milestones and exciting fetal development specific to this week of pregnancy!