Pregnancy Calendar at Week 3
Hi, Mama!
I'm right here with you 💙
This week, I took a big step — I found a cozy little spot inside you and slipped into your wall of uterus. Now, I'm home sweet home!
I'm still that tiny little thing — about the size of a poppy seed, and you can’t feel me yet. But inside, I’m already starting to change in amazing ways. In just a few days, I’ll be one tiny cell nestled into your body, on a journey to grow and develop.
Right now, I don’t have a heart or a little arm and leg — I look a lot like a tiny bubble filled with fluid. But I already have something that makes me totally unique: my eyes, skin, and gender — all decided now! Want to see?
Until then, you might not even notice I’m here, but your body is already starting to feel my presence. I sent a signal — called HCG. It’s like a little sign saying, "Mom, I’m here!" You might soon see two lines on a pregnancy test. That’s our first big Hello — through tiny stripes, but with a huge meaning.
If there’s two of us, we’re all in this together, growing fast and strong. While you’re taking a breather, we’re building a tiny little beginning. Thanks for this incredible journey!
With love,
your tiny poppy seed 🥚
What’s Happening with Your Body
During your pregnancy, your body has already started to go through some major changes, even if many women don't notice it right away. If you're experiencing short menstrual cycles, it's possible that the first signs of pregnancy could show up in the third week. For most women, a typical menstrual cycle lasts around four weeks.
The uterus and ovaries
The size of the uterus increases quite a bit and it starts to feel noticeably bigger than usual. The cervical mucus becomes more sensitive, and any touch to the area can cause discomfort. Around the third week of pregnancy, you might notice spotting due to implantation — a key hormone that’s essential to maintaining pregnancy.
Breasts
In the early weeks of pregnancy, your breasts might become tender, and your nipples may darken. As pregnancy progresses, this tenderness can become more pronounced. Many women start to notice enlarged veins and sensitivity to clothing and footwear. About 70% of women notice tender breasts and darkening of the areolas, which is a sign of increased blood flow to the breast tissue.
Stomach and intestines
By the third week of pregnancy, you may experience mild nausea, and weight gain isn't necessarily linked to fetal development but rather to excessive fluid retention and hormones. An increased hormonal background can smooth out the lining of the intestinal walls, which may lead to minor constipation. The characteristic signs of pregnancy, such as morning sickness, often start around the fourth week.
Internal reproductive organs
During the third week of pregnancy, abnormalities in the ovaries can worsen pre-existing chronic prostate issues. This is linked to immune system weakening. If you notice pain in this area early, don't ignore it — it could be a sign of pregnancy loss. By the third week, women with reproductive pathologies may have more frequent internal bleeding, indicating early miscarriage. It's important to consult a doctor rather than self-medicating. Up to 80% of women have ovarian cysts or endometrial growths, which can be mistaken for pregnancy signs.
Problems with the fallopian tubes
In the third week of pregnancy, changes in the fallopian tubes may become noticeable. An increase in hormone levels can slow down tubal motility — which can lead to miscarriage if the fertilized egg gets stuck in the tube. Sensitive or scarred fallopian tubes can also make conception difficult. Blood flow issues caused by inflammation or hormonal imbalances can cause significant discomfort and may impede the early development of the embryo, increasing the risk of ectopic pregnancy. Ultrasound after the 4th week can reveal whether the embryo is properly implanted in the uterus, which is a crucial indication of pregnancy health.
Gastrointestinal tract
During the third week, pregnancy-related changes in the digestive system can cause mild nausea. Weight gain at this stage isn't directly related to fetal growth but can be due to fluid retention and hormonal shifts. The hormonal background stabilizes, and nausea tends to subside on its own. Avoid heavy physical activity and strenuous workouts as pregnancy progresses. Socialize and stay active, but listen to your body.
What is and isn’t safe
From the very first days of pregnancy, a woman should pay more attention to her health and reevaluate her lifestyle. By the third week, early pregnancies often go unnoticed, but strong menstrual cramps, bleeding from the uterine arteries, or other discomforts should prompt you to see a doctor. Taking folic acid is recommended. Avoid medicines without consulting a healthcare professional. Even common headache pills and fever reducers can be risky for your baby.
Risks of fetal anomalies
Infections with cytomegalovirus can be dangerous for pregnant women, even in the third week. During this period, active division of cells and organ formation in the baby begins. If an infection becomes active at this stage, it can lead to developmental issues.
What you can and cannot do as a pregnant woman:
- Continue working if your job isn't physically demanding. Don't see your condition as a disease already at 3 weeks. If you feel well, it's better to go to work after 30 weeks, and possibly later.
- Take folic acid. Supplementing with vitamins is still beneficial at this stage.
- Avoid alcohol, smoking, and drugs from the very first days. Quit all harmful habits by the third week of pregnancy.
- Do not take medications without a doctor’s consultation. Even mild ailments can be dangerous for your baby.
What is and isn’t permissible
- Avoid excessive physical exertion, especially heavy lifting and intense sports. Don't perceive your condition as a disease — after 3 weeks, you should start paying attention to your health and monitor your lifestyle. Meeting friends, walking in cafes, and enjoying moderate activity is fine.
- Monitor your emotional health. Pregnancy is not a reason to ignore your well-being. Emotional stress can increase cortisol and adrenaline levels, which are harmful in early pregnancy.
Healthy Eating
During pregnancy, it's really important that you eat well so that your baby gets all the nutrients they need to grow up healthy and strong. Most essential microelements for the body come from a balanced diet and support the future baby's development, as well as help prevent pregnancy-related health issues.
Here's what we recommend for the third week:
- Consume more dairy products. During this period, your immune system starts actively supporting your bone and muscle structure, helping prevent pregnancy-related issues.
- Include seasonal vegetables and fruits in your diet—they're packed with vitamins and beneficial nutrients, and they're a great source of fiber, carbohydrate, and healthy fats.
In the third week of pregnancy, many women still experience mild nausea and changes in appetite. Consuming enough protein supports the processing of cells and blood formation, and can reduce nausea symptoms. Additionally, dairy products help replenish gut microflora, which is beneficial for digestion.
For breakfast and lunch, include complex carbohydrates. They don’t cause sharp spikes in blood sugar levels, which is especially important during week 3 of pregnancy. Since excess sugar can trigger insulin spikes and lead to gestational diabetes, it’s best to limit simple sugars.
It’s also advised to take a prenatal vitamin containing:
- Fruits;
- Vegetables;
- Seafood;
- Dairy products;
- Eggs and nuts;
- Herbs;
- Chocolate.
Magnesium
A deficiency in magnesium during week 3 can cause muscle cramps. Low magnesium levels may also lead to fatigue, irritability, and arterial blood pressure fluctuations. Not enough magnesium in week 6 and 12 can also be a cause of miscarriage in week 3 of pregnancy.
You can get these nutrients from:
- Seafood;
- Red fish;
- Shellfish;
- Worms;
- Caviar;
- Herbs.
Vitamin E
In the third week of pregnancy, it’s especially important to maintain an adequate level of vitamin E. Tocopherol plays a key role in regulating hormonal background and normal functioning of the nervous system and brain. A deficiency in vitamin E can lead to increased uterine tone.
Therefore, it’s best to get the necessary microelements from:
- Liver;
- Eggs;
- Fish;
- Seafood;
- Yogurt;
- Herbs;
- Chocolate.
Magnesium (again)
A magnesium deficit during week 3 can lead to muscle cramps. Lowering of uterine wall muscles can cause detachment of the placental egg and miscarriage. Insufficient magnesium intake can also cause symptoms like increased uterine tension, irritability, and fluctuations in blood pressure.
It's recommended to take a multivitamin complex only as per your doctor’s advice.
Helpful Tips
If you found out you're pregnant more than a third of the way through, take a moment to reflect on your life. It's important to quickly decide whether to distance yourself from harmful habits if you haven't already. From now on, everything you eat, drink, and even your feelings will pass on to your baby. In the first few days after confirming pregnancy, a woman is responsible for her own future child. The main rule for the next nine months is to prioritize a healthy lifestyle.
These initial three weeks are the earliest times when partners can learn about the pregnancy. New feelings, strengthened by hormonal changes, make women more emotionally sensitive. Future dads should stay patient and supportive, ready to accommodate their partner’s mood swings. This period can be quite intense emotionally, so patience and understanding will help both of you navigate through it smoothly.
Exercises for Future Moms
On the third trimester, most women continue to live their usual routines and might not notice any changes happening in their body. That’s why many future moms keep up with sports. If you already have a pregnancy test result confirmed, it’s best to be a bit more careful with physical activities.
To improve circulation in the lower back area, it’s recommended to do the following:
- Daily walks;
- Swimming;
- Gymnastics;
- Exercises to strengthen the back muscles;
- Yoga.
Troubles during pregnancy
- Nausea: During the third week of pregnancy, women may experience nausea with first signs of toxicosis. Nausea appears initially and can escalate to vomiting.
- Constipation: Hormonal changes and decreased gastrointestinal activity can lead to constipation and gas formation.
- Increased salivation: During the third week of pregnancy, women may feel weakness, increased salivation, and decreased work capacity, which are related to hormonal changes.
- Discharges from sexual pathways: Changes in the reproductive system can lead to discharges from sexual pathways related to immune system suppression.
- Headaches: Hormonal changes or emotional stress can cause headaches.
