Week by week / Second trimester
Week 23
Your baby is about the size of a large mango. Here is what is happening, what you might feel, and the two or three things worth doing this week.
Size right now
A large mango
28.9 cm / 11.4 in, 501 g / 1 lb 2 oz
- Length
- 28.9 cm / 11.4 in
- Weight
- 501 g / 1 lb 2 oz
- Trimester
- Second
- To go
- 17 weeks
The baby
Half a kilogram. The lungs begin producing surfactant, the substance that lets them inflate. Blood vessels in the lungs are developing for breathing.
You
Braxton Hicks contractions may start: a painless tightening that comes and goes without a pattern.
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.