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37 Weeks Pregnant

At 37 weeks, the baby is early term and practising breathing and sucking.
Baby is about the size ofA winter melon
LengthAbout 48.6 cm
WeightAbout 2.9 kg
Week 37 of 40, third trimester3 weeks to go

Your baby at 37 weeks

Your baby is now early term. It is practising breathing, sucking and gripping, ready for life outside the womb.

Your body at 37 weeks

The mucus plug that seals your cervix may come away as a thick, jelly-like discharge, sometimes streaked with blood. Labour may still be days or weeks away.

Your checklist this week

  • Know the signs of labour: regular, strengthening contractions, waters breaking or a show.
  • Have your hospital bag and car seat ready by the door.
  • Keep checking your baby’s movements every day.
Week 36
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Week 38

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

Your baby this week

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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.