30 of 40 weeks
Baby size this week
As lovely as a butternut squash
Measurements are averages — every baby grows at their own pace.
Length 39.9 cm 15.7 in
Weight 1.32 kg 2 lb 15 oz
Your baby this week
- Red blood cell production shifts to the bone marrow
- Lanugo begins to disappear
- Your baby's eyes can track light
- Early milk ducts form — amniotic fluid volume peaks
Your body this week
Heartburn
Swelling
Insomnia
Braxton Hicks
This week's to-do
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How we measure week 30
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.