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21 Weeks Pregnant: Baby Size, Development & Symptoms

Your baby is about the size of a carrot.

By Cushies Editorial Team · 2 min read · Updated 7 August 2026

Baby's sizeAbout the size of a carrot
Lengthabout 27 cm
Weightabout 360 g
TrimesterSecond trimester, month 5

Your baby this week

Movements are now stronger and more coordinated.

Your body this week

You may notice stretch marks on your bump.

Tip of the week

Moisturise your skin to ease itching.

Quick answers

How big is my baby at 21 weeks?

About the size of a carrot: around 27 cm long and around 360 g.

How many months is 21 weeks pregnant?

21 weeks is in month 5 of pregnancy, in the second trimester.

This article is general information, not medical advice. If you are worried about your health or your baby's, please talk to your doctor.

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