Tommy's PregnancyHub

12 weeks pregnant – all you need to know

It’s been a busy few weeks: Everything is now in place - the organs, limbs, bones and muscles are in place and growing.

What does my baby look like in week 12?

Your baby, although tiny, is now fully formed. They are about the size of a plum.

From now on, your baby is going to grow, grow, grow! The placenta is also fully developed. The cartilage skeleton is beginning to turn into hard bone. Even though you can’t feel it yet, your baby is moving, waving and dancing. They can also swallow.

Get weekly updates on your baby's development from our expert midwives straight to your inbox.

Pregnancy symptoms in week 12

Congratulations - you’ve made it through the tiring first trimester. You’re a third of the way through and you should have more energy in the second trimester.

Are you drooling in your sleep?

Excess saliva is one of pregnancy’s little surprises - it’s totally normal and probably caused by hormones.


Some women find they’re more prone to nosebleeds during pregnancy.

What to do in week 12

Your first scan

Between week 11 and 13+6 you’ll be offered an ultrasound scan - and your first chance to see a glimpse of the tiny life inside you! It’s sometimes known as the dating scan and the sonographer (the person who scans you) will be able to check whether your due date is accurate by measuring the size of your fetus.

The scan happens in the hospital, and most offer a copy of the picture of your baby from your scans. You may need to pay for this, so take some money with you to your scan appointment. They are printed on thermal paper, so don't laminate them!

“It was such a relief to know everything was okay and get a photo of our baby. At that point, you know it's real and it's happening.”Emma, mum of one

It’s also worth asking your midwife about antenatal classes in your area. Your hospital or birth centre is likely to offer free NHS classes, in which they cover the birth, birth plans, breastfeeding and early days with your baby.

Antenatal classes won't usually start until mid- to late pregnancy but they can get booked up quickly so it's worth signing up for them now.

If you haven't yet been given a date for your booking appointment or scan, contact your doctor or midwife.

Deciding where to give birth

You can start thinking now about where you’d like to give birth. It could be a midwife-led birth centre, a hospital birth centre or a home birth.

The choices that you have will depend on where you live and whether you have any health complications.

If you decide early on in your pregnancy where you would like to have your baby, you can change your mind later.

Read more about choosing where to give birth

Staying safe

There are a few important symptoms that you should look out for in pregnancy because if you have them they could indicate a more serious problem. Find out what the symptoms to look out are here.

Booked a check-up at the dentist yet?

Pregnancy hormones can be unkind to teeth (and you’re more likely to suffer from bleeding gums) so you need to take extra care of both. Going to the dentist is free in pregnancy and for a year after your baby is born. Don’t forget your exemption card.  

Telling people about your pregnancy

After week 12, the risk of miscarriage becomes lower and less of a worry.

If you haven't told friends, family and colleagues about your pregnancy yet, you may be thinking about doing it around now.

If you decide to tell your employer about your pregnancy now, ask them to do a risk assessment to ensure your workplace is safe and comfortable for you and your baby. 

NHS choices (2013). You and your baby at 9-12 weeks pregnant. (Page last reviewed: 31/03/2017 Next review due: 31/03/2020)

NHS Choices Miscarriage overview, (Page last reviewed: 01/06/2018  Next review due: 01/06/2021)

NICE (2008) Antenatal care for uncomplicated pregnancies,Clinical guideline [CG62] Last updated: January 2017.

Review dates

Last reviewed: 25 June 2018
Next review: 25 June 2021