Baby Size
Week 7

Your Baby is the Size of a Blueberry

Week 7

Blueberry

Length

1 cm / 0.4 in

Weight

< 1 g

Your baby has doubled in size since last week and the brain is growing rapidly — producing about 100 new cells every minute.

Development at Week 7

At 7 weeks, your baby's head is large relative to the body as the brain develops at a remarkable pace. The arm and leg buds are growing and beginning to differentiate into distinct segments. The liver is now producing red blood cells, taking over this role until the bone marrow is ready.

Next week

At week 8, your baby will be the size of a Raspberry.
See Week 8

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