At 16 weeks, you're officially 4 months pregnant!
As your second trimester hums along, your baby's growing rapidly, and you might start seeing changes to your own body, too — so if you haven't already gone shopping for maternity clothes, now's the time.
Your Baby at Week 16
At a Glance
16 weeks pregnant is how many months?
If you're 16 weeks pregnant, you're in month 4 of your pregnancy. Only 5 months left to go! Still have questions? Here's some more information on how weeks, months and trimesters are broken down in pregnancy.
How big is my baby at 16 weeks?
Your baby now weighs in at a whopping 3 to 4 ounces and is 4 to 5 inches in length.
The backbone and tiny muscles in your baby's back are gaining strength, so she can straighten out that head and neck even more.
Baby's eyes are working
Thanks to those developing facial muscles, your baby is capable of making a few expressive frowns and squints, even at this early stage.
Baby's beautiful eyes are finally working too, making small side-to-side movements and perceiving light, although the eyelids are still sealed. Peekaboo!
Baby's skin is transparent
Your fetus is becoming a looker too — with a face that's starting to look more human — but a skinny looker, since there's no baby fat yet.
And here's the skinny on baby skin: It's practically translucent now, so if you took a peek inside your uterus, you'd be able to see your baby's blood vessels under that thin skin.
Baby will soon hear your voice
Listen up: Tiny bones in your fetus' ears are in place, making it likely that baby will soon be able to hear your voice (or something like it) when you're speaking. Generally, babies fully develop the ability to hear in the womb by 18 weeks of pregnancy.
In fact, studies have found that babies who hear a song while they're in the womb recognize the same tune when it's sung to them after they’re born — so choose your lullabies with that in mind.
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