DueNest
All calculators

31 Weeks Pregnant

At 31 weeks, all five senses are working. Your breasts may leak a little colostrum.
Baby is about the size ofA coconut
LengthAbout 41.1 cm
WeightAbout 1.5 kg
Week 31 of 40, third trimester9 weeks to go

Your baby at 31 weeks

All five senses are working. The baby can turn its head from side to side and is spending more time awake and alert.

Your body at 31 weeks

Some people notice a little yellowish fluid leaking from their breasts. This is colostrum, the first milk, and it is completely normal.

Your checklist this week

  • Start packing your hospital bag.
  • Buy or borrow an infant car seat if you will be travelling home by car.
  • Use breast pads if colostrum leaks.
Week 30
All weeks
Week 32

Not sure which week you are in?

Use our Due Date Calculator or Pregnancy Week Calculator to find out exactly how far along you are.

Your baby this week

Sign up for a short weekly email about your baby’s growth, what is changing in your body and what to do next. Free, and you can unsubscribe at any time.

Jump to a week

Find your week

When to call your doctor

  • Bleeding from your vagina
  • Severe pain in your tummy
  • A bad headache, blurred vision or sudden swelling
  • Fluid leaking from your vagina
  • Fever, or pain when you pass urine
  • Later in pregnancy, your baby moving less than usual

In an emergency, call your local emergency number.

Based on ACOG and NHS guidance. Sizes are averages: every baby grows at its own pace.