39 weeks pregnant
Trimester 3 · about 8 months · baby is about the size of a mini watermelon.
Baby at 39 weeksa mini watermelon50.7 cm · 3.3 kg
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Your baby this week
Full term (39+0 to 40+6 weeks, ACOG definition).
You this week
Watch for signs of labour: regular contractions, waters breaking, a show.
Frequently asked questions
How many months is 39 weeks pregnant?
39 weeks is about 9.0 months of gestation, counted from the first day of your last period. You are in the third trimester.
How big is a baby at 39 weeks?
Around 50.7 cm long and 3.3 kg, roughly the size of a mini watermelon. 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.