9 of 40 weeks
Baby size this week
As lovely as a cherry
Measurements are averages — every baby grows at their own pace.
Length 2.3 cm 0.9 in
Weight 3 g 0.11 oz
Your baby this week
- All basic body parts are present
- Tiny earlobes are visible
- The heart finishes dividing into four chambers
- The tail has vanished — your baby looks human
Your body this week
Nausea
Heartburn
Mood swings
Headaches
This week's to-do
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How we measure week 9
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.