3rd trimester · Week 30
30 weeks pregnant
Bone marrow takes over; lanugo thins
Bone marrow becomes the main blood factory. Lanugo begins to thin on some areas. Space is tighter, so movements may feel sharper rather than bigger.
How big is your baby at 30 weeks?
- Length
- 39.9 cm
- Weight
- 1,320 g
- Size
- Eggplant
On average about 39.9 cm long and 1,320 g. Size comparison: Eggplant.
These are averages; every baby grows at their own pace.
How is your baby developing at 30 weeks?
The brain is growing quickly. The fetus practices breathing and sucking. Length is often about 40 cm; weight near 1.3 kg. Eyes can focus somewhat on light changes.
What changes in your body at 30 weeks?
Insomnia, hip pain, and swelling that worsens in heat are common. Braxton Hicks can increase. The navel may flatten or pop.
Tips for this week
A firm mattress, side-lying, and limiting late caffeine (if you use any) may help sleep. Do not take sleeping tablets unless prescribed in pregnancy. Reduced movements still matter — do not wait until morning if the pattern is clearly down.
