18 of 40 weeks
Baby size this week
As lovely as a bell pepper
Measurements are averages — every baby grows at their own pace.
Length 14.2 cm 5.6 in
Weight 190 g 0 lb 7 oz
Your baby this week
- Your baby yawns and stretches
- Hearing is developing — the ears reach final position
- Myelin begins coating the nerves
- An ultrasound can usually confirm sex clearly
Your body this week
Round ligament pain
Backache
Nasal congestion
Skin changes
This week's to-do
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How we measure week 18
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.