DueNest
All calculators

24 Weeks Pregnant

At 24 weeks, the lungs start making surfactant. The glucose test window for gestational diabetes begins.
Baby is about the size ofAn ear of corn
LengthAbout 30 cm
WeightAbout 600 g
Week 24 of 40, second trimester16 weeks to go

Your baby at 24 weeks

The lungs are beginning to make surfactant, a substance that will help them inflate after birth. The skin is thin and wrinkled, and will smooth out as fat builds up.

Your body at 24 weeks

Your bump is growing steadily. Many people are offered a glucose test between 24 and 28 weeks to check for gestational diabetes.

Your checklist this week

  • Ask about your glucose screening test, usually done between 24 and 28 weeks.
  • Know the signs of early labour: regular contractions, lower back pain, pressure in the pelvis or a change in discharge.
  • Keep track of your baby’s movements.
Week 23
All weeks
Week 25

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.