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12 weeks pregnant

What to expect this week

What's happening in week 12 of your pregnancy

12 weeks pregnant

You are in the final week of your first trimester and your baby has changed beyond all recognition from week one!

12 weeks pregnant

  • Your tiny baby is now 6cm in length and fully formed
  • Their eyelids remain fused shut
  • Their little wrists and elbows bend as they move around

How big is my baby at 12 weeks?

Your tiny baby is now a compact 6cm in length, and fully formed, although it is unlikely you would be able to get a reliable sexing at a scan just yet. They are moving around a lot at this stage, but you still won't be able to feel this for a while as they still have a lot of space to bob about in. Their eyelids remain fused shut at week 12 (they will open at around week 27), and their little wrists and elbows bend as they move around. 

Facts to know about your baby in week 12

  • By now, your baby is producing urine which is peed out into the surrounding amniotic fluid
  • Your tiny baby is now fully formed and around 5.5cm
  • Your baby's little wrists and elbows bend now as they move around
  • Baby's finger nails and toe nails are forming
  • As well as a developing skeleton, your baby's organs and intestines are now developing

You at 12 weeks pregnant

You are now in the last week of your first trimester – doesn't time fly? You might be putting morning sickness and extreme exhaustion behind you a bit now, although all those hormones could still be leaving you somewhat emotional! You are probably having lots of fun leafing through baby catalogues and mulling over nursery colour schemes, so now could be a good time to think about any changes you need to make to your home – you probably won't want decorators in, or having to make big decisions (or even do some light DIY yourself) late in pregnancy. You might also be finding it hard to resist a few sneaky purchases of unisex baby clothes now, too.

And if you've had your dating scan you are no doubt the very owner of a set of ultrasound images of your baby son or daughter!

Facts to know about you in week four

  • Florence, Autumn and Arya were last year's highest climbing baby girls' names
  • Dribbling on your pillow at night? Excess saliva is common during pregnancy, particularly in the first trimester

What to think about in week 12 

If you have an existing health condition you might be worrying about how you will manage it in pregnancy, even if it is something fairly common like asthma. Your GP and midwives will of course have given you advice on this from your earliest appointments, and checked that your medication was suitable for use in pregnancy, even so, do keep an eye on any changes at all in your health, and always flag any new or heightened symptoms up, no matter how small -  you might find that for some health issues, your meds need tweaking or monitoring as your pregnancy evolves.

Watch our videos below:

Video 1: The first scan (12 weeks)
Video 2: Staying healthy during pregnancy
Video 3: Pregnancy exercise from Nuffield Health

12 weeks pregnant

  • Your tiny baby is now 6cm in length and fully formed
  • Their eyelids remain fused shut
  • Their little wrists and elbows bend as they move around

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