7 of 40 weeks
Baby size this week
As lovely as a blueberry
Measurements are averages — every baby grows at their own pace.
Length 1 cm 0.4 in
Weight 1 g 0.04 oz
Your baby this week
- The brain grows quickly — 100 cells per minute
- Arm buds become paddle-shaped
- Kidneys move into position
- The umbilical cord is fully formed
Your body this week
Nausea
Food aversions
Excess saliva
Acne
This week's to-do
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How we measure week 7
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.