42 weeks pregnant
Trimester 3 · about 9 months · baby is about the size of a watermelon.
Baby at 42 weeksa watermelon51.9 cm · 3.7 kg
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Your baby this week
Post-term. Induction is usually recommended by now.
You this week
Keep tracking movements and call if they slow down.
Frequently asked questions
How many months is 42 weeks pregnant?
42 weeks is about 9.7 months of gestation, counted from the first day of your last period. You are in the third trimester.
How big is a baby at 42 weeks?
Around 51.9 cm long and 3.7 kg, roughly the size of a 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.