DueNest
All calculators

33 Weeks Pregnant

At 33 weeks, the baby’s bones are hardening and it is receiving your antibodies.
Baby is about the size ofA pineapple
LengthAbout 43.7 cm
WeightAbout 1.9 kg
Week 33 of 40, third trimester7 weeks to go

Your baby at 33 weeks

The bones are hardening, except for the skull, which stays soft so the baby’s head can pass through the birth canal. Antibodies from your blood are passing to the baby to protect it after birth.

Your body at 33 weeks

Swelling in your feet and ankles and difficulty sleeping are common now.

Your checklist this week

  • Remember the warning signs of pre-eclampsia: severe headache, blurred vision, pain under the ribs or sudden swelling.
  • Sleep on your side with a pillow between your knees.
  • Take short rests during the day.
Week 32
All weeks
Week 34

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.