6 of 40 weeks
Baby size this week
As lovely as a sweet pea
Measurements are averages — every baby grows at their own pace.
Length 0.6 cm 0.2 in
Weight 0.4 g 0.01 oz
Your baby this week
- The heart beats around 110 times per minute
- Arm and leg buds appear
- The neural tube closes
- Dark spots mark the future eyes
Your body this week
Nausea
Fatigue
Food aversions
Mood swings
This week's to-do
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How we measure week 6
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.