Week by week / First trimester
Week 12
Your baby is about the size of a lime. Here is what is happening, what you might feel, and the two or three things worth doing this week.
Size right now
A lime
5.4 cm / 2.1 in, 14 g / 0 oz
- Length
- 5.4 cm / 2.1 in
- Weight
- 14 g / 0 oz
- Trimester
- First
- To go
- 28 weeks
The baby
Reflexes are working. If you prod your belly the baby will move, though you will not feel the answer. The kidneys are producing urine.
You
The uterus rises out of the pelvis, which is when a bump can first genuinely show.
This week
NT scan window opens at 12w3d
Book a dental checkup, pregnancy gums bleed and dental care is free or covered in many places
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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.