Week by week / First trimester
Week 13
Your baby is about the size of a pea pod. Here is what is happening, what you might feel, and the two or three things worth doing this week.
Size right now
A pea pod
7.4 cm / 2.9 in, 23 g / 1 oz
- Length
- 7.4 cm / 2.9 in
- Weight
- 23 g / 1 oz
- Trimester
- First
- To go
- 27 weeks
The baby
Vocal cords form. Fingerprints are already there, unique and permanent. The baby is now roughly the size of your fist.
You
Last week of the first trimester. Energy usually starts coming back.
This week
First trimester ends at 13w6d
If you have not had the NT scan, this week is the last of the window
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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.