31 weeks pregnant: baby is the size of a coconut
At 31 weeks, baby is about the size of
a coconut
Baby's brain is growing very fast.
- Length41.1 cm (16.2 in)
- Weight1.5 kg (3 lb 5 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 31 weeks?
At 31 weeks, baby is about the size of a coconut: around 41.1 cm (16.2 in) long from head to heel, and weighs about 1.5 kg (3 lb 5 oz). Every baby grows at their own pace.
What trimester is 31 weeks?
31 weeks is in the third trimester.
How many months pregnant is 31 weeks?
Roughly month 7 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.