Home › Week by Week Pregnancy Week by Week UK Follow your baby's development from the fourth week of pregnancy to week 40. Each week includes baby size comparisons, development milestones, and tips for expectant parents.
All Weeks First Trimester Second Trimester Third Trimester
Wk
Week 4 First Trimester
🌱 Poppy seed • 0.1 cm
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Week 5 First Trimester
🍏 Apple seed • 0.2 cm
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Week 6 First Trimester
🫐 Blueberry • 0.6 cm
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Week 7 First Trimester
🍇 Grape • 1.0 cm
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Week 8 First Trimester
🍓 Raspberry • 1.6 cm
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Week 9 First Trimester
🍒 Cherry • 2.3 cm
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Week 10 First Trimester
🍊 Kumquat • 3.1 cm
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Week 11 First Trimester
🌿 Fig • 4.1 cm
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Week 12 First Trimester
🍋 Lime • 5.4 cm
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Week 13 Second Trimester
🍑 Peach • 7.4 cm
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Week 14 Second Trimester
🍋 Lemon • 8.7 cm
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Week 16 Second Trimester
🥑 Avocado • 11.6 cm
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Week 18 Second Trimester
🍠 Sweet potato • 14.2 cm
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Week 20 Second Trimester
🍌 Banana • 16.4 cm
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Week 22 Second Trimester
🌿 Papaya • 27.8 cm
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Week 24 Second Trimester
🌽 Corn on the cob • 30 cm
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Week 26 Second Trimester
🥒 Courgette • 35.6 cm
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Week 28 Third Trimester
🍆 Aubergine • 37.6 cm
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Week 30 Third Trimester
🥦 Broccoli head • 40 cm
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Week 32 Third Trimester
🥥 Coconut • 42.4 cm
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Week 34 Third Trimester
🎃 Butternut squash • 45 cm
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Week 36 Third Trimester
🍈 Honeydew melon • 47.4 cm
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Week 37 Third Trimester
🌿 Swiss chard bunch • 48.6 cm
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Week 38 Third Trimester
🌿 Leek • 49.8 cm
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Week 39 Third Trimester
🍉 Small watermelon • 50.7 cm
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Week 40 Third Trimester
🎃 Small pumpkin • 51.2 cm
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