Pregnancy

13 Weeks Pregnant: What to Expect During Pregnancy

Team Peanut6 months ago4 min read

You’re in your third month of pregnancy and the last week of the first trimester — inching ever closer to the second trimester. Yay! At 13 weeks pregnant, you still might be feeling under the weather with some lingering early pregnancy symptoms, but what else is going on in that ever-expanding 13-weeks-pregnant belly of yours?

13 weeks pregnant woman

What to expect at 13 weeks pregnant

13-week fetus

Your 13-week fetus is now 3 inches long (about 7.6cm) and weighing an incredible 28 grams. Your lemon-sized baby is developing their vocal cords ready for their first solo and with newly formed arm and leg bones, they’re practicing their dance moves too.

At 13 weeks old, your baby’s intestines, which have been growing in a cavity inside the umbilical cord, have thankfully relocated into their abdominal space, which will be slightly more convenient for them further down the track.

Their facial features are in the right spots now, so if you have a 13-week pregnant ultrasound, you’ll probably be able to see a fairly human-like set of eyes, ears, nostrils, and lips. What a cutie!

What you won’t see, however, is the soft coating of fuzzy peach-hair (lanugo), which is growing all over them. The lanugo helps bind a white, waxy coating of a substance called vernix onto your baby’s skin which keeps them warm and protected from bacteria in their amniotic swimming pool for the next 6-ish months.

So that’s peanut covered (pun intended) — what about you, mama?

13 weeks pregnant symptoms

Around now, the placenta takes over hormone production for the baby, so you might find yourself experiencing less of those mood-swings. Sighs of relief all round!

Your uterus has grown up and out of your pelvis so you might be rocking a cute little 13 weeks pregnant bump, and you might feel more confident to start sharing your news (if you haven’t already). Whether you’re showing or not and sharing, or not, it’s all good, mama.

And whatever you’re up to on the outside, there’s plenty of stuff going on on the inside…

Uh-oh, you’re a bit blocked up

Yep, constipation can be a real buzz-kill around now. Blame it on the progesterone that’s coursing through your body for slowing down your digestive tract.

There’s what in your underwear?!

We’re talking leukorrhea, the milky discharge that increases during pregnancy. It’s usually nothing to worry about, but keep an eye out for any bleeding, or funny colored or smelly discharge that may indicate an infection.

Your veins are everywhere!

Increased blood flow means your veins are probably pretty visible right now, snaking their way across your expanding boobs and belly. A visual reminder of all the amazing work your body is doing right now.

If you start feeling like you have more energy and fewer physical pregnancy symptoms, it’s a good time to take stock of your mental wellbeing.

Too much stress, and feeling anxious or depressed during pregnancy can be damaging, so seek help if you need it. It might be good to talk.

So many questions, so little time. Here are two more answers to common questions to tick off your list…

Is 13 weeks the 2nd trimester?

Not quite. Although there’s some debate, officially, the 2nd trimester is week 14 to week 28.

What is my baby doing at 13 weeks?

Around now your baby is nailing their swallowing and urinating, so you know what this means? Over the next few weeks, the composition of the amniotic fluid will change until it’s mostly composed of urine for the second half of pregnancy. Nice.

🤰 Read next:
14 Weeks Pregnant: What to Expect
Your Pregnancy Week By Week Guide