At 5 weeks pregnant, you’re now in month 2 of your pregnancy. This week, you can officially take a pregnancy test — your hCG hormone levels are high enough to show a positive result, and you may have early symptoms like fatigue and nausea.
As for your baby? The embryo is starting to look more like a fetus, and your little one's heart and circulatory system are developing.
Your Baby at Week 5
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 one-twentieth of an inch long. Still pretty small, but a lot bigger than it’s been…and getting bigger every day!
Wondering what your growing baby looks like now? 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 rythym. 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 body building 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.
At a Glance
5 weeks pregnant is how many months?
If you're 5 weeks pregnant, you're in month 2 of your pregnancy. Only 7 months 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 5 weeks?
At 5 weeks pregnant, your little embryo is still super tiny, measuring about the size of an orange seed.
Baby has a tail
So what does your baby look like now? Actually, not unlike a tadpole, with a rudimentary head and a tail. But don't worry, there's no frog in your future.
In fact, you're fewer than eight months away from holding a real prince or princess in your arms. While all this is happening, the hCG hormone levels in your body are now high enough to confirm that you're expecting using a home pregnancy test. Go to the doctor to confirm the good news and figure out your due date.
The heartbeat may be visible
It takes a lot of developing to become a baby — all the major and minor bodily systems (digestive, circulatory, nervous and so on) and organs, like the heart, lungs and stomach, have to form from scratch.
The first system to be operational is the circulatory system, or blood — along with its companion organ, the heart, which you may even be able to see beating on an early ultrasound toward the end of the week, though it's more commonly visible at week 6 or 7.
When you're 5 weeks pregnant, your baby's heart is made up of two tiny channels called heart tubes and they're already hard at work. When those tubes fuse together, your baby will have a fully functioning heart, though he almost certainly has his grip on yours already!
Also in the works this week are several other organs, including the neural tube — the precursor to your baby's brain and spinal cord — which hasn't yet sealed. But by next week, that open-door policy is over.
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