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13 Weeks Pregnant

At 13 weeks, you reach the end of the first trimester. Energy often returns as nausea fades.
Baby is about the size ofA lemon
LengthAbout 7.4 cm
WeightAbout 23 g
Week 13 of 40, first trimester27 weeks to go

Your baby at 13 weeks

This is the last week of the first trimester. The vocal cords are forming, the intestines move from the umbilical cord into the tummy, and the baby keeps growing quickly.

Your body at 13 weeks

Energy often returns and nausea fades for many people. A small bump may start to show, especially if this is not your first pregnancy.

Your checklist this week

  • Look at comfortable clothing or a bra with more support.
  • Keep up gentle exercise, such as walking, swimming or pregnancy yoga.
  • Ask any questions about your screening results.
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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.