What’s Happening at 6 weeks pregnant
6 Weeks Pregnant – The Heartbeat Begins
At 6 weeks pregnant, your baby has gone from a tiny cluster of cells to a rapidly developing embryo — and one of the most exciting milestones is here: the very first heartbeat. While you might not see much of a bump yet, your body is already working hard to support this new life.
What’s Happening in Your Body
- Hormones are in full swing – Rising levels of hCG, estrogen, and progesterone are helping your baby grow, but they may also be the reason for fatigue, nausea, or mood swings.
- Increased blood volume – Your body is pumping more blood to supply your uterus and developing placenta.
- Early pregnancy symptoms can include:
- Morning sickness (which can happen any time of day)
- Breast tenderness and fullness
- Frequent urination
- Bloating and mild cramping
- Food cravings or aversions
- You may feel more tired than usual — rest is your friend right now.
Baby’s Size at 6 Weeks
- About 4–6 mm long — roughly the size of a lentil or sweet pea.
- Growing rapidly — doubling in size every week at this stage.
What Baby Looks Like
- Your baby is now an embryo with a curved, C-shaped body.
- The neural tube (future brain and spinal cord) is closing.
- Tiny buds are forming that will become arms and legs.
- The heart tube has started beating — usually detectable by ultrasound this week.
- Facial features are starting to take shape with early eye and ear structures.
What You Should Be Eating at 6 Weeks Pregnant
Your baby’s brain, heart, and major organs are developing — your nutrition is the building block.
| Nutrient | Why It’s Important | Food Sources |
|---|---|---|
| Folic Acid (400–800 mcg/day) | Prevents neural tube defects | Leafy greens, fortified cereals, lentils |
| Protein | Supports organ and muscle growth | Eggs, poultry, fish (low-mercury), beans |
| Iron | Supports increased blood production | Lean red meat, spinach, beans (pair with vitamin C foods) |
| Calcium | Builds bones and teeth | Dairy, fortified plant milks, almonds |
| Omega-3 (DHA) | Supports brain and eye development | Salmon, chia seeds, walnuts |
| Vitamin B6 | Helps reduce nausea and supports metabolism | Bananas, chickpeas, poultry |
| Hydration | Supports amniotic fluid and nutrient transport | Water, herbal teas, water-rich fruits |
Foods & Substances to Avoid
- High-mercury fish (shark, swordfish, king mackerel)
- Raw or undercooked meats and seafood
- Unpasteurized dairy and juices
- Alcohol
- Limit caffeine to 200 mg/day (about one 12-oz cup of coffee)
Tips for Week 6
- Take your prenatal vitamin daily.
- Eat small, frequent meals to manage nausea.
- Get plenty of rest — your body is using extra energy.
- Book your first prenatal visit if you haven’t already.
- Avoid smoking and exposure to harmful chemicals.
Even though your baby is only the size of a lentil, their heart is already beating, and the foundations for every organ and body system are forming. This week marks the start of an incredible transformation.
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