Baby Size
Week 21

Your Baby is the Size of a Carrot

Week 21

Carrot

Length

26.7 cm / 10.5 in

Weight

360 g / 12.7 oz

Your baby's bone marrow is now actively producing blood cells, taking over this role from the liver and spleen.

Development at Week 21

At 21 weeks, your baby's movements are well-coordinated enough that you may notice patterns in activity and rest. The eyelids and eyebrows are fully developed, and the eyes are complete, though they remain sealed. Surfactant, the substance that allows the lungs to expand at birth, is beginning to be produced.

Next week

At week 22, your baby will be the size of a Papaya.
See Week 22

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