From poppy seed to watermelon
How big is your baby?
Choose a week to see an easy-to-picture size comparison, with estimated length and weight.
Choose your pregnancy weekWeek 20
110203040
Measurements are averages. Every baby grows at their own perfectly individual pace.
Week 20
This week, your baby is about
the size of a banana
Head to heel, your baby is growing and getting stronger every day.
Length25.6 cm10.1 in
Weight300 g0 lb 11 oz
The whole journey
Watch how baby grows
Tap any comparison to jump to that week.
About these measurements
Length and weight are approximate averages based on standard fetal growth references. Earlier weeks are measured crown to rump; later weeks are shown head to heel. Your ultrasound measurements may differ and your care team is the best source for your baby's growth.
For general information only. This tool does not replace advice from your doctor or midwife.
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