🤰 Pregnancy week by week

20 Weeks Pregnant: Baby Size, Development & Symptoms

Your baby is about the size of a banana.

By Cushies Editorial Team · 2 min read · Updated 9 August 2026

Baby's size	About the size of a banana
Length	about 25 cm (head to heel)
Weight	about 300 g
Trimester	Second trimester, month 5

Your baby this week

Halfway there! The baby swallows amniotic fluid and is practising digestion.

Your body this week

The anomaly scan is usually done between 18 and 22 weeks.

Tip of the week

Start thinking about birth preferences and your hospital choice.

Quick answers

How big is my baby at 20 weeks?

About the size of a banana: around 25 cm (head to heel) long and around 300 g.

How many months is 20 weeks pregnant?

20 weeks is in month 5 of pregnancy, in the second trimester.

This article is general information, not medical advice. If you are worried about your health or your baby's, please talk to your doctor.

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