20 Weeks Pregnant: Baby Size, Symptoms & Tips

Your baby at 20 weeks

You are halfway! From now on, babies are measured head to heel, and yours is about the length of a banana. They are swallowing amniotic fluid, which helps their digestive system practice.

Your body at 20 weeks

The top of your uterus is around your belly button. Most people feel their baby move by now, and the anatomy scan often takes place this week.

Common symptoms at 20 weeks pregnant

Regular baby movements
Shortness of breath
Heartburn
Swollen feet and ankles

Every pregnancy is different. Having none of these symptoms is normal too.

Tips for week 20

At the anatomy scan you can usually find out the baby's sex if you want to.
Elevate your feet when you can to reduce swelling.
Start a baby registry and nursery plan.

Your week 20 checklist

Anatomy scan if not done yet
Start a baby registry
Elevate your feet to ease swelling

Helpful at 20 weeks

20 Weeks Pregnant: your questions answered

How big is a baby at 20 weeks pregnant?

At 20 weeks your baby is about the size of a banana: around 25 cm (9.8 in) long and weighing about 300 g (11 oz). Every baby grows at their own pace.

How many months is 20 weeks pregnant?

20 weeks pregnant is month 5 of your pregnancy, in the second trimester. Your due date is 20 weeks away.

Is 20 weeks halfway through pregnancy?

Yes. A full-term pregnancy is about 40 weeks, so at 20 weeks you are halfway to your due date.

Sources

This guide is written from public guidance by the American College of Obstetricians and Gynecologists (ACOG), the NHS, the CDC and the World Health Organization. Baby sizes are averages; your baby may be bigger or smaller and still perfectly healthy.

General information only, not medical advice.

History of updates

October 21, 2026: Added a weekly checklist and common questions.
October 21, 2026: Matched fruit, length and weight to the Prego app.
October 21, 2026: Published.