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  • Post last modified:September 15, 2021

When you are 5 weeks pregnant, most women will receive a positive pregnancy test result. And even if you still haven’t tested positive, you may notice other early signs of pregnancy.

Inside your body, your baby’s heart will start to beat 22 days after conception, which is by the end of this week or the beginning of the next. A special moment for sure!

This article will cover fetal development, how big your baby is, pregnancy symptoms, and what’s happening with your body, mom.

Week 4 | Week 6

5 weeks pregnant what to expect

What to Expect When 5 Weeks Pregnant

How Many Months is 5 Weeks Pregnant?

Being 5 weeks pregnant means you have entered month 2 of your pregnancy. You are still in your first trimester.
To keep things simpler, it is easier to track pregnancy in weeks. However, like most women, you would also probably want to know how many months pregnant you are at a certain point.

Read our post on how to count pregnancy weeks and months to avoid confusion in the future.

Your Baby at 5 Weeks

How Big is my Baby at 5 Weeks?

The fetal age of your baby is now 3 weeks. At 5 weeks (already!), your baby is as large as a sesame seed.

What Does my Baby Look Like at 5 Weeks Pregnant?

At this point, the shape of the embryo is similar to that of a tadpole. But, don’t worry, that will soon change, and in only a bit over 7 months, you’ll be holding your baby in your arms.

Fetal Development

Ultrasound of embryo at 5 weeks pregnant

With all the growing and developing taking place inside your body, your embryo now has 3 layers – the ectoderm, the mesoderm, and the endoderm. These 3 parts will develop into the organs and tissues of your infant.

The ectoderm layer, or top layer, is where the neural tube develops into your baby’s nervous system, for things such as the brain, spinal cord, skin, and hair, and even mammary glands and tooth enamel. This neural tube runs from the top to the very bottom of the embryo.

The mesoderm layer, the middle layer, is used to eventually develop the heart and circulatory system, bones, cartilage, muscles, and organs. This week your little one’s heart divides into chambers in order to beat and pump blood.

The endoderm, or the inner layer, is used to develop a simple tube that will later become the lungs, intestines, liver, pancreas, thyroid, and bladder for your baby.

At this time in embryo growth, the heart and very primitive circulatory system functions will form quite rapidly as needed by the growing baby. The heart starts as a simple tube-like structure and is beginning to form. Although it will start beating soon, you won’t be able to see it on the ultrasound until week 6 or 7. The blood begins to circulate as the baby already has some of its own blood vessels.

The placentais growing so that it can nourish the growing baby with everything it needs from its mother.

Mom’s Body When 5 Weeks Pregnant

The Belly

Although you are probably looking forward to seeing your belly growing, you won’t be able to see it just yet. It will take a couple of months to start noticing it. You might be a little bit bloated, but there’s no actual baby bump yet.

However, once it starts growing, you’ll have plenty of time to observe and enjoy it.

Pregnancy Symptoms

5 weeks pregnant bellyHave you gotten a positive pregnancy test yet? If so, congratulations!

If not, this can be a very stressful time, looking for signs of pregnancy, running to the toilet to see if the period has started, squeezing the breasts to see if they are tender – and if they are, wonder if that is because you’ve squeezed them too much… :-)

Did you think you were the only one behaving like a lunatic around the time when your period is due? Not at all!

But if you are trying to conceive and your menstruation is late, you might find out soon if you are pregnant.

This is a time when many women question if they are indeed carrying a child, even if their period is late because, for some women, it takes a while before their bodies produce enough hCG to create a positive result on a home pregnancy test.

5 weeks pregnant, many hormonal changes in your body are happening without you even knowing it.

Nausea can be the first indication of pregnancy for some women, while others may start having sudden food cravings or need frequent trips to the bathroom.

Other possible early pregnancy symptoms are tender breasts and being extra tired or moody.

Things to Do and Buy This Week

Many women who monitor their bodies closely have already found out they are pregnant, and they start with prenatal care and dietary changes..

Do not worry if you have not been taking prenatal vitamins or preventative care measures until now. Just be sure that once you realize that you do have an infant arriving soon, stock up on your prenatal supplements and start eating healthy.

You know your own body best, and if you have that “feeling,” do not ignore it, and be sure to make better choices for your diet and turn down that glass of wine with dinner.

If you are considerably active, you should remain active unless a medical practitioner has instructed you otherwise. Having a healthy body during pregnancy and afterward will help with your delivery and the recovery once your little one has been born.

If a physical activity has not been a part of your routine, check with your doctor or midwife what type of moderate exercise you could do during pregnancy.

Even a nice walk each evening after dinner can help your circulation and elevate your heart rate enough to get a good work out.

Week 5 Pregnancy Video

5 Weeks Pregnant: What to Expect in 5th Week of Pregnancy?

Diary of a Daughter

What’s it really like being 5 weeks pregnant…? Here’s a true diary from a 5 weeks pregnant mom (Me..!)

On June 23, the very day my period was due, my pregnancy test came back positive. I’m pregnant. I can’t believe it. I’m pregnant!!! I am praying that this will be a real pregnancy and not an early miscarriage like it was the last time.

Are you also 5 weeks pregnant? Please share your experiences and thoughts by leaving a comment below!

Read Next


Mayo Clinic, Mayo Clinic Guide to a Healthy Pregnancy
Joanne Stone MD and Keith Eddleman MD, The Pregnancy Bible: Your Complete Guide to Pregnancy and Early Parenthood
Nilsson, L; Hamberger, L. A Child Is Born
Soderberg, L., Mammapraktika. B Wahlstroms.

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