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28 Weeks Pregnant

At 28 weeks, the third trimester begins. The baby can blink and is gaining weight quickly.
Baby is about the size ofAn aubergine
LengthAbout 37.6 cm
WeightAbout 1 kg
Week 28 of 40, third trimester12 weeks to go

Your baby at 28 weeks

Welcome to the third trimester. The baby can open and close its eyes and blink. It is gaining weight quickly and its brain is developing fast.

Your body at 28 weeks

Appointments usually become more frequent from now. You may feel more tired, and the baby’s kicks can be strong.

Your checklist this week

  • From 28 weeks, go to sleep on your side rather than on your back.
  • Get to know your baby’s pattern of movements. Contact your maternity unit straight away if movements slow down or change. Do not wait until the next day.
  • Have your anti-D injection if you are Rh negative and it is recommended.
Week 27
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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.