20 of 40 weeks
Baby size this week
As lovely as a banana
Measurements are averages — every baby grows at their own pace.
Length 25.6 cm 10.1 in
Weight 300 g 0 lb 11 oz
Your baby this week
- You've reached the halfway point
- Taste buds are working — your baby tastes what you eat
- Meconium, baby's first stool, collects in the bowel
- Swallowing increases as digestion practices
Your body this week
First flutters
Backache
Nasal congestion
Bigger appetite
This week's to-do
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How we measure week 20
Pregnancy weeks are counted from the first day of your last menstrual period, following standard ACOG and NHS guidance. Sizes are crown-rump length in early weeks and head-to-heel from around week 20. Your care team may adjust dates after an ultrasound.
BumpCount offers general information and does not replace advice from your doctor or midwife.