31 weeks pregnant
Trimester 3 · about 7 months · baby is about the size of a coconut.
Baby at 31 weeksa coconut41.1 cm · 1.5 kg
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Your baby this week
All five senses are working.
You this week
Leaky breasts (colostrum) can start.
Frequently asked questions
How many months is 31 weeks pregnant?
31 weeks is about 7.1 months of gestation, counted from the first day of your last period. You are in the third trimester.
How big is a baby at 31 weeks?
Around 41.1 cm long and 1.5 kg, roughly the size of a coconut. 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.