Week by week / First trimester
Week 7
Your baby is about the size of a blueberry. Here is what is happening, what you might feel, and the two or three things worth doing this week.
Size right now
A blueberry
1.3 cm / 0.5 in
- Length
- 1.3 cm / 0.5 in
- Trimester
- First
- To go
- 33 weeks
The baby
The brain is growing fast, around 100 new cells a minute. Hands and feet are paddles. The umbilical cord is formed and working.
You
Frequent urination starts, driven by hormones and blood volume rather than by size. Food aversions can be violent and specific.
This week
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Averages, not targets. Babies vary a great deal and a scan that reads differently from this page is not a problem. Anything that worries you is a call to your midwife or doctor, not a search.