24 of 40 weeks
Baby size this week
As lovely as an ear of corn
Measurements are averages — every baby grows at their own pace.
Length 30 cm 11.8 in
Weight 600 g 1 lb 5 oz
Your baby this week
- Lungs develop branching airways and blood vessels
- The skin becomes more opaque as fat fills in
- Your baby responds to your voice
- Babies born now have a chance of survival with intensive care
Your body this week
Linea nigra
Backache
Leg cramps
Stretch marks
This week's to-do
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How we measure week 24
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.