5 Weeks Pregnant - What To Expect Your 5Th Week Of Pregnancy - Pregnancy Week By Week - 2023

5 Weeks Pregnant – What to Expect Your 5th Week of Pregnancy

Heidi Murkoff from the beloved “”What to Expect”” series discusses your baby’s development at 5 weeks pregnant.

Your baby is the size of an orange seed (how fast they grow!). His or her’s heart and circulatory system are already forming, while the hCG hormone levels in your body are now high enough to confirm that you’re expecting using a home pregnancy test.

Welcome to week five of your pregnancy, the beginning of your second month. Hey! Only seven more to go! Your pregnancy is still new, but that embryo inside of you is growing fast and furious from the size of a poppy seed last week to as big as an orange seed right now – around 1/20 of an inch. Still pretty small, but a lot bigger than it’s been – and getting bigger every day!

Wondering what your growing baby looks like now? Actually, not much like a baby. Your little one has elongated from a ball of cells to a teeny tadpole-like shape, with a distinguishable head and, believe it or not, a tail. Not to worry, though. That tail will disappear soon enough, and a cute little baby bottom will take its place.

This week, a primitive heart begins to form and beat, pumping blood through your embryo’s emerging shape. The heart comes first because blood flow is essential. Without that blood flow, organs and the digestive and nervous systems won’t be able to form. At this early stage the design of the micro heart is still pretty rustic, with only two tubes pumping to a really unrhythmic rhythm. The heart won’t be fully functional until those tubes fuse together and the heartbeats coordinate, activity that requires a brain!

Fortunately, your baby’s brain is well past the blueprint phase. The neural tube, which will ultimately become baby’s spinal cord and brain, is under construction. And if that’s not enough bodybuilding going on, a rudimentary digestive system is taking shape, too. There’s a tube extending from the mouth to the tail of the embryo – and this tube will eventually turn into the stomach, liver, pancreas, and intestines.


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  1. 😭Just dramatising when seeing how people are praying for babies while am here stuck with Pregnancy😘😭 no where to go,nothing to do,nothing to hold to..no money to mentain it,no ticket,no visa extension cash,.Just stuck in arabic country where I was working en now supporting myself while jobless after corona… fur away from home(Africa) with less than a month visa and nothing My friends en boyfriend are just forcing me for abortion against my wish.😭😭God pliss do something I dowona do this to my first child.left with no choice bt I wona fight for my kid.so dramatising en depressive.My single oldparent is sick en being the breadwinner he's just gonna die of pressure😭😭when i inform them back home. Blessings in the midst of pain bt am thenkful atlist I can hold my pregnancy it's more than wealth pliss God do a Miracle for me..I Need it now.🙏🙏I can't do it en continue holding the guilt,one thing I know the fight is worth.I know people slide,do mistakes en others are sucumstances bt no matter the reason two mistakes don't make a right.I want to get my baby through struggles rather abort my otherSaul.You worth fight my Prince/Princess.Pliss pray for me😭🤦🙏guys.🙏🙏🙏🙏

  2. Wow I am 5 weeks now but may ovulated late so i may be 4 weeks. Theres no sac yet they can only see thickness of my uterine lining 15.3mm and corpus luteum cyst. I just feel sore breast and uterine cramps. I tested early my implantation was a day before my ultrasound

  3. 5 weeks today with my rainbow baby 🌈 I hope this pregnancy is the real deal. It’s been almost 3 years since my first miscarriage and I just want to fast forward out of the first trimester 😕

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Written by Claire

Claire is our Community Manager here at New Moms Forum. A mom of two (almost grown-up babies), Claire has been building and operating community-based websites for almost 20 years. In her downtime, Claire enjoys spending time with her family and drinking copious amounts of red wine!

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