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Pregnancy Week by Week

Find out how big your baby is, what is changing in your body, and what to do, for every week of pregnancy. Choose your week below, or calculate it from your due date.

First trimester

Weeks 1 to 13. Your baby's organs form, and you may feel nausea and tiredness as hormones rise.

  1. 1 Week PregnantBefore conception
  2. 2 Weeks PregnantBefore conception
  3. 3 Weeks PregnantStardust
  4. 4 Weeks PregnantSize of a poppy seed
  5. 5 Weeks PregnantSize of a poppy seed
  6. 6 Weeks PregnantSize of a sweet pea
  7. 7 Weeks PregnantSize of a sweet pea
  8. 8 Weeks PregnantSize of a raspberry · 1 g
  9. 9 Weeks PregnantSize of a raspberry · 1 g
  10. 10 Weeks PregnantSize of a strawberry · 4 g
  11. 11 Weeks PregnantSize of a strawberry · 4 g
  12. 12 Weeks PregnantSize of a lime · 14 g
  13. 13 Weeks PregnantSize of a lime · 14 g

Second trimester

Weeks 14 to 27. Often the most comfortable stretch: your bump shows, and you feel your baby move.

  1. 14 Weeks PregnantSize of a lemon · 43 g
  2. 15 Weeks PregnantSize of a lemon · 43 g
  3. 16 Weeks PregnantSize of a lemon · 43 g
  4. 17 Weeks PregnantSize of a pear · 140 g
  5. 18 Weeks PregnantSize of a pear · 140 g
  6. 19 Weeks PregnantSize of a pear · 140 g
  7. 20 Weeks PregnantSize of a banana · 300 g
  8. 21 Weeks PregnantSize of a banana · 300 g
  9. 22 Weeks PregnantSize of a banana · 300 g
  10. 23 Weeks PregnantSize of a mango · 500 g
  11. 24 Weeks PregnantSize of a mango · 500 g
  12. 25 Weeks PregnantSize of a mango · 500 g
  13. 26 Weeks PregnantSize of a papaya · 760 g
  14. 27 Weeks PregnantSize of a papaya · 760 g

Third trimester

Weeks 28 to 40+. Your baby gains weight and gets ready for birth, and you get ready to meet them.

  1. 28 Weeks PregnantSize of a coconut · 1 kg
  2. 29 Weeks PregnantSize of a coconut · 1 kg
  3. 30 Weeks PregnantSize of a coconut · 1 kg
  4. 31 Weeks PregnantSize of a coconut · 1 kg
  5. 32 Weeks PregnantSize of a coconut · 1 kg
  6. 33 Weeks PregnantSize of a coconut · 1 kg
  7. 34 Weeks PregnantSize of a pineapple · 2.1 kg
  8. 35 Weeks PregnantSize of a pineapple · 2.1 kg
  9. 36 Weeks PregnantSize of a pineapple · 2.1 kg
  10. 37 Weeks PregnantSize of a honeydew melon · 2.9 kg
  11. 38 Weeks PregnantSize of a honeydew melon · 2.9 kg
  12. 39 Weeks PregnantSize of a honeydew melon · 2.9 kg
  13. 40 Weeks PregnantSize of a watermelon · 3.4 kg
  14. 41 Weeks PregnantSize of a watermelon · 3.6 kg
  15. 42 Weeks PregnantSize of a watermelon · 3.6 kg

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Prego updates every morning with your baby's size and what to do today.

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