3 weeks pregnant
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3 Weeks Pregnant: All You Need To Know

Published on January 25, 2022 – Last Updated on May 10, 2022

If you’re pregnant or trying to get pregnant, you may be wondering what’s happening with your body at 3 weeks pregnant. You’re probably not showing yet, but a lot is going on inside your body as it starts to prepare for the baby. In this article, we’ll talk about the changes taking place in your uterus and cervix and how your hormone levels are changing. We’ll also give you some tips for staying healthy during pregnancy. So keep reading to learn more about being three weeks pregnant!

The Baby at 3 Weeks of Pregnancy

The sperm races to the egg, but only one can reach it (through the fallopian tube). The membrane closes after they enter, and no other sperms will be able to go through their doors (the way). This genetic information in each of these cells passes on when fertilizing an ovum; then, there’s some growth happening behind those 32 cell layers within 3 days which soon becomes 250 at week three weeks! A new life looks something like 2mm tall – not much bigger than your thumbnail nowadays either: just enough time for amniotic fluids surrounding this miniature human being before birth, and this fluid is essential for life too.

At three weeks pregnant, the main change in your uterus is that it’s becoming heart-shaped. Your baby doesn’t have a heartbeat yet. Still, this early on during pregnancy, the uterus is starting to change shape because of the presence of hCG (human chorionic gonadotropin), which is released by cells right around implantation time. The changes to your uterus will continue throughout pregnancy. At three weeks pregnant, the embryo is just .04 inches long, or about the size of a sesame seed! For 3 weeks pregnant, it’s still way too early to feel movement, but your baby’s brain and spine are beginning to form.

The gender of a baby is determined at the moment of fertilization; however, you won’t be able to find it at this point.

3 weeks pregnant is how many months?

If you are in the third pregnancy week, you are in the first trimester and the first month of pregnancy. You are 37 weeks to go until your due date. Pregnant women can use our due date calculator to determine early pregnancy symptoms and calculate their due date based on their last menstrual period.

3 Weeks Pregnancy Symptoms

symptoms at 3 weeks of pregnancy

Make sure to check out our Pregnancy Week by Week post, where you can find great information for each stage of pregnancy based on weeks.

Your body is going through a lot of changes at this stage. Some women experience pregnancy symptoms in week 3, while others do not realize that they are pregnant until later. Here, we will look at some common early signs and symptoms and your baby’s appearance in the third week of pregnancy.

  • Emotions: Pregnancy can be an emotional roller coaster, even this early. You may feel excited and anxious as you wait to take a pregnancy test, or perhaps nervous with anticipation of what the results will show- either way, it’s natural for there to range from one emotion (or more!) at different points during your journey into motherhood.
  • Weight: You’ve probably gained a few pounds at this point (typically between 1 and 5). Your body will continue to gain weight throughout the next eight months. It’s important to remember that proper nutrition is vital during pregnancy, so be sure to take care of yourself with healthy foods.
  • Energy Level: As your hormones are still adjusting, your energy levels may be up and down. Although you’ll feel more like yourself as the weeks go on, you may still experience fatigue or exhaustion throughout pregnancy. If you are feeling exhausted, try to get some rest, but don’t forget that exercise is good for you at this point in your pregnancy – make sure not to overdo it. If you want to boost your energy, you can use crystals for pregnancy.

What is going on in your body when you are three weeks pregnant?

  • Cravings: Cravings are common during pregnancy and can differ for each woman. It’s possible that you may crave something sweet at this point in week 3, or it could be something else entirely! Try to eat a balanced diet to make sure that your baby is getting everything they need during the first trimester of development. Just remember to avoid anything potentially dangerous, such as raw meat or undercooked eggs.
  • Tiredness: You may be feeling tired, especially if you realize that you are pregnant at this stage. Remember to take care of yourself and get plenty of rest during week 3. The third trimester can also cause fatigue for many women, so don’t worry- you will have time to sleep then!
  • Frequent urination: You may begin to feel the need to urinate more often at this point in week 3 of pregnancy. This is a good sign, as it means that your bladder has not yet been pushed beyond its limits. As long as you drink plenty of fluids and don’t find yourself struggling with this symptom, most doctors consider frequent urination normal during the first trimester.
  • Heartburn: Heartburn is a common first-trimester pregnancy symptom that can be helped with the proper remedies. If you are experiencing heartburn at this point in week 3, try eating smaller meals and avoid lying down or bending over shortly after eating. In addition, some other remedies, such as drinking orange juice, lemonade, or soda water, can help with heartburn.
  • Nausea or vomiting: Many women experience some degree of nausea, especially in the first trimester. Although it is not pleasant to feel sick, this is a normal part of pregnancy and usually goes away after the first month.

3 Weeks Pregnancy Checklist and Tips

week 3 pregnancy checklist

When you are three weeks pregnant, it is essential to adopt healthy habits that will ensure a healthy pregnancy for you and your baby. Avoid smoking and drinking alcohol. Try to limit your caffeine intake, and eat healthy foods that are full of fruits and vegetables. Make sure to get enough sleep at night and manage your stress levels.

  • Take your prenatal vitamins: Your healthcare provider may give you a prescription for prenatal vitamins, or you can purchase them over the counter. Either way, be sure to take them daily. A prenatal vitamin contains all of the essential nutrients that your developing baby needs. Folic acid is a must!
  • Use positive affirmations: At this point in week 3, you may not be feeling the best. Try to keep your mind focused on positive thoughts about your pregnancy. Don’t let negative feelings overwhelm you- it’s essential now more than ever to stay healthy and strong for your baby!
  • Stack on pregnancy tests: A pregnancy test won’t tell you much even though you have a missed period. But it’s helpful to be prepared for the upcoming weeks. A blood test, however, may reveal the soon-to-be baby.
  • Get some pregnancy books: Want to learn more about your growing baby? Then, it’s time to pick some hypnobirthing books.
  • Practice hypnobirthing: Hypnobirthing is highly recommended. It is an excellent way to prepare for your new baby while also relieving the stress of pregnancy.
  • It’s time to start planning for your maternity leave: You need to ensure that you have enough money saved up in case you decide not to return to work after giving birth.

3 Weeks Fetus

At three weeks old, your baby is about the size of a poppy seed. They’re starting to develop their facial features, including their eyes, nose, and mouth. Their arms and legs are also beginning to form, and they have started to grow little webbed fingers and toes. Although they’re still very tiny, your baby is growing rapidly and is already beginning to look like a human being.

Despite their small size, 3-week-old fetuses are quite developed. They have a beating heart and are starting to circulate their own blood. They also have functioning kidneys and a digestive system, and their brain is beginning to form. In fact, at this stage, your baby’s brain is one of the most active parts of the body. They’re making new connections and learning how to process information every day.

So while they may not be much to look at yet, 3-week-old fetuses are actually amazing creatures. They will continue to grow and develop at an astounding rate in just a few short weeks. Before long, they’ll be ready to enter the world and start exploring all that life has to offer.

3 Weeks Pregnant Belly

Your 3-week pregnant belly is well-shaped. It’s hardly noticeable yet, but you will surely have one in the next couple of weeks. Except for the pregnancy hormones, your 3-week pregnant belly is due to the uterine implantation bleeding that happened after the fertilized egg attached itself to the uterus lining. This process often causes light vaginal bleeding, brown spotting, or even cramping symptoms which you may be familiar with if you have previously experienced a miscarriage. However, the symptoms are so mild that many women don’t even notice them.

3 Weeks Ultrasound Pictures

3 weeks ultrasound

At week 3, the expecting mothers may start expecting some changes in their bodies. You can’t stop wondering what is going on inside of your body at the moment, right? Getting ultrasound pictures done will satisfy your curiosity and ensure that everything is okay with your baby. It’s an excellent way to bond with your developing baby too.

The soon-to-be embryo is hardly noticeable at this point.

3rd Pregnancy Week: The Cervix

At three weeks pregnant, your cervix is becoming softer and more swollen. It changes color from pink to purple. The uterine lining becomes thicker, too, in preparation for pregnancy. However, unless you’ve had a previous pelvic infection or cervical abnormality, the only way to know if you have an abnormal cervix is at your prenatal exam.

3 Weeks Pregnant: What to Expect

pregnancy hormone fertilized egg

By this time, you might be feeling a little bit queasy. That’s because your hormone levels have increased dramatically at three weeks pregnant, and so has the rate of blood flow in your body. So you could feel dizzy or lightheaded when you get up suddenly from a seated or lying down position. Be careful when you get up from a couch or bed to avoid falling, and try not to do activities that make you feel woozy.

In terms of actual symptoms, most women say they have heartburn at three weeks pregnant, probably because the growing uterus puts pressure on the stomach and pushes it into your diaphragm. To counteract the effects of pregnancy heartburn, avoid eating for at least two hours before you go to bed at night. Watch what you eat during the day, and wear loose clothing around your waist. If certain foods worsen your heartburn, try avoiding them or see if taking an antacid helps ease the discomfort.


At this point in your pregnancy, you may be feeling many different emotions. You might feel excited and happy about the fact that there’s an actual baby on its way or you could just as quickly feel overwhelmed by what it means to be three weeks pregnant.

Your fetal development at three weeks pregnant is quite exciting. Even though it’s tough to be patient, you will appreciate what this early stage has in store as your pregnancy goes on. Know that your baby becomes more active and responsive with every passing day, week, and month. Right now, she’s beginning to form the structures that will support her for the remainder of her time inside your uterus. The embryo itself, which weighs less than a gram, will grow exponentially over the next few months.

We hope we’ve given you some helpful information here so that you can start understanding more about what happens during week 3 of pregnancy! If not, don’t worry – we’re always ready to help answer any questions or concerns with our experts. So if anything doesn’t make sense for whatever reason, reach out, and we’ll do everything possible to get back in touch with you right away with answers and resources.

Other Pregnancy Weeks:

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