Pregnancy author Heidi Murkoff from the best selling What To Expect series tells us what’s happening at 12 weeks of pregnancy.
While it’s hard to believe, your baby has more than doubled in size the past three weeks! He or she is now the size of a plum and has a functioning digestive system.
It’s a landmark week for your little one, since most of his key body systems and vital organs are fully formed by now. Your baby will spend the rest of his gestation bringing those systems up to speed and full maturation so they’ll be able to function to perfection once his big birthday arrives.
Your fetus can now boast the achievement of having more than doubled in size in just three weeks. Crown-to-rump length is about two and a half inches, so he’s about the size of a kiwi, but weighs a lot less, just half an ounce. A fair amount of heft is in that crown: basic brain structure is complete and now it’s time for that brain mass to rapidly increase.
Your baby’s thyroid is now fully formed, the pituitary gland has started producing hormones, and the pancreas has begun to synthesize insulin. Not to be outdone, your baby’s bone marrow is churning out white blood cells, the critical weapons needed to fight infection once your little warrior is on the outside and no longer protected by your immune system.
Muscles in the digestive tract are getting primed, practicing their contractions so they can process food – and lots and lots of poop – after birth. And even though much of the small intestines are still folded up in storage in the umbilical cord, the villi – tiny, finger-like projections that absorb nutrients from food – are now in place.
The best development of all? If you haven’t already heard it, this is the week that your cutie’s heartbeat will come through loud and clear at your checkup. And that’ll be music to your ears.
28 CommentsLeave a Reply
12 weeks today, anymore July Mom's? Congrats ladies!
Any advice on things you wished you'd known from those further along? Thank you!
I’m 12 weeks today, due July 11, 2021. 💕🥲
12 weeks with twins ! Paraguard iud twins
Wow I'm here.. thank God
I’m 12 weeks today! So excited 😊😊
First pregnancy! Super nervous and excited!
I made it to 12 weeks 🥰👶
I’m 2 days away from 12 weeks 🙏🏼🙏🏼
After 2 failed ivfs and 3 years of heartbreak and sadness I am finally pregnant and just approaching 12 weeks. I have my scan 2work. Nervous and excited
12 weeks today with our third baby, I had vomiting and nausea , I can’t eat anything, it’s normal ?
12 weeks & 3 days it’s been tough but thank god its getting better 🙏🏽☺️❤️
I'm 12 weeks today and I'm so happy
12 weeks tomorrow 🙏🏽🙏🏽🙌🏽🥰 Thank you lord
Im also 12.6wks… H.C.. cm65
Fetal heart 144 its.. good tell me baby boy or girl🥰
After making efforts to have a baby for 3 months, I made a decision that I need to try something new. Fortunately, I discovered this guide and tried it This plan is an amazing guide in recognizing your body’s differences and menstrual periods. I`m heartening my buddies to try to plan. You could learn about this method more by getting to Google. I think name of this tip is Sofia Goρazna
I’m 12 weeks and don’t even feel pregnant anymore. I’m 18 and don’t have medicate so I don’t even get to go check up on my baby.😭 I wonder if everything is okay.
Officially 12 weeks today 🤗🤗🤗❤️❤️
Heyyy there congratulations to all future mothers out there.. I have come here to see how my little warrior is doing with his/her mom after 12 weeks. This never goes off of my head…love and best wishes for all of you….😘♥️
Feels like time has stopped… It's a Long wait to see your first child…
i just turnt 12 weeks today july 11,2021😍🥰🤰🏽
I’ll be 11 weeks tomorrow with baby # 2 but my appointment is the following week. So I skipped week 11 video 🤣
I’m 12 weeks!!! 🥰😍🥰
I hit 12weeks on June 13, 2020 it's so exciting to hear everything that's happening
12 days tomorrow and am already for my baby cause whew child😂😂
M 12 weeks pregnant anti scan done today but dr adviced me to come after a week for anti scan i am scared please help
I'm 12 weeks today!!!! Yay!!! I'm due Oct. 20th!!!
I am 12 weeks and 2 days! Feeling good so far but scared of the thought of labour and caring for a little human being!! I am due 12th October!
I’m 12 weeks as of yesterday Im due September 21 congrats to all the other mommy’s !!!
12 weeks today! On bed rest for a subchorionic hemmorage tho. But I do think it's healing