18 weeks pregnant
Trimester 2 · about 4 months · baby is about the size of a bell pepper.
Baby at 18 weeksa bell pepper14.2 cm · 190 g
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Your baby this week
Ears are in their final position and the baby may hear sounds.
You this week
Sleeping on your side becomes more comfortable.
Care this week: Anatomy (anomaly) scan: usually 18 to 22 weeks.
Frequently asked questions
How many months is 18 weeks pregnant?
18 weeks is about 4.1 months of gestation, counted from the first day of your last period. You are in the second trimester.
How big is a baby at 18 weeks?
Around 14.2 cm long and 190 g, roughly the size of a bell pepper. 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.