§first trimester · week 6 of 40
you're 6 weeks pregnant.
last revised · baby is about 0.4 cm (0.16") · 0.2 g (0.01 oz)
about the size of a lentil.
The embryo curls into a tiny crescent. Eyes, ears, and limb buds start sketching themselves.
this week's highlights
- Facial features sketching
- Arm and leg buds emerge
- Heart has four chambers
- Strong morning queasiness common
how your baby looks
A C-curled shape with dark spots where the eyes will be, tiny pits for ears, and four small buds that will become arms and legs.
body in focus
- head
- Eye spots, ear pits, and nasal pits begin to appear.
- body
- Heart has four chambers; major blood vessels are forming.
- hands
- Tiny arm buds emerge from the body wall.
- feet
- Tiny leg buds emerge from the body wall.
what's happening in your body
Morning sickness can hit full force. Smells you used to love may now turn your stomach. Frequent peeing and bone-deep tiredness are common.
gentle tips
- Keep crackers by the bed for first-thing morning nausea.
- Try ginger tea or candies if smells are overwhelming.
- Skip raw seafood and deli meats — listeria risk.
- Schedule your first prenatal ultrasound for weeks 8–10.
- Walk for 15–20 minutes a day to boost energy.
what to expect next
Limbs grow longer and the head starts to round out. By week 8 the embryo will look distinctly baby-shaped on ultrasound.