38 of 40 weeks
Baby size this week
As lovely as a mini watermelon
Measurements are averages — every baby grows at their own pace.
Length 49.8 cm 19.6 in
Weight 3.08 kg 6 lb 13 oz
Your baby this week
- Brain and lungs finish their final weeks of maturation
- The toes grip, the organs are ready
- Your baby continues adding fat for warmth
- Head circumference matches the abdomen
Your body this week
Heartburn
Swelling
Insomnia
Braxton Hicks
This week's to-do
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How we measure week 38
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.