21 weeks pregnant
Trimester 2 · about 4 months · baby is about the size of a carrot.
Baby at 21 weeksa carrot26.7 cm · 360 g
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Your baby this week
The baby swallows amniotic fluid and the digestive system practises.
You this week
Movements become more regular.
Frequently asked questions
How many months is 21 weeks pregnant?
21 weeks is about 4.8 months of gestation, counted from the first day of your last period. You are in the second trimester.
How big is a baby at 21 weeks?
Around 26.7 cm long and 360 g, roughly the size of a carrot. These are averages; individual babies vary.
Not sure which week you're in? The pregnancy calculator works it out from your last period or due date.