39 weeks pregnant: baby is the size of a mini watermelon
At 39 weeks, baby is about the size of
a mini watermelon
Full term starts this week.
- Length50.7 cm (20.0 in)
- Weight3.3 kg (7 lb 4 oz)
- Trimester3 of 3
Baby is measured from head to heel at this stage. These are rounded averages. Your ultrasound is the only real measurement of your baby.
Questions moms ask
How big is a baby at 39 weeks?
At 39 weeks, baby is about the size of a mini watermelon: around 50.7 cm (20.0 in) long from head to heel, and weighs about 3.3 kg (7 lb 4 oz). Every baby grows at their own pace.
What trimester is 39 weeks?
39 weeks is in the third trimester.
How many months pregnant is 39 weeks?
Roughly month 9 of 9.
Related tools
This page gives estimates, not medical advice. If you're worried about your baby's growth, talk to your doctor or midwife.