Week 12 Pregnancy
12 weeks pregnant at a glance
- You are in the first trimester.
- Your baby is roughly the size of a plum.
- Dating scan and combined screening test (if chosen) usually happen this week.
- Every pregnancy is different, so don't worry if your experience varies slightly.
You are 12 weeks pregnant and in your first trimester. Your baby is about the size of a plum. This week's key development: Almost Out of Hiding. NHS note: Dating scan and combined screening test (if chosen) usually happen this week.
This page is for general pregnancy planning and date guidance only. It is not medical advice, diagnosis, or treatment. Pregnancy dates are estimates and can change after a scan or advice from your midwife, GP, or maternity team. Always speak to a qualified healthcare professional if you have symptoms, concerns, or questions about your pregnancy.
Baby's Development
Your baby is about the size of a plum.
Almost Out of Hiding — Your baby can open and close their fists, and the digestive system is beginning to practise moving. Most major organ systems are in place. You're approaching the end of the first trimester — the time many families choose to share their happy news.
Your Symptoms
- Nausea may start to lift
- Increased energy
- Clearer skin for some
Every pregnancy is different. You may experience all, some, or none of these symptoms — and that's completely normal. If anything concerns you, speak to your midwife.
NHS Appointments
Dating scan and combined screening test (if chosen) usually happen this week.
Practical Advice for Week 12
Nutrition
- You can stop taking folic acid after this week — but continue vitamin D throughout pregnancy.
- Nausea may be easing — enjoy re-discovering foods you love.
- Ensure you're eating enough protein (meat, fish, eggs, beans, lentils) for your baby's growth.
- Drink water consistently throughout the day.
Exercise
- As energy returns, you may feel ready to exercise more — listen to your body.
- Swimming is wonderful in the second trimester as your bump grows.
- Continue pelvic floor exercises — make them a daily habit.
- Consider a structured pregnancy fitness programme if you enjoy having a plan.
Wellbeing
- Many parents choose to share their news after the dating scan — do what feels right for you.
- Nausea easing can feel like a relief but also bring anxiety — both reactions are normal.
- This is a natural time to feel a burst of optimism — enjoy it.
- If you've been struggling with sickness, be kind to yourself — the first trimester is hard.
Preparation
- Your dating scan and combined screening test (if chosen) usually happen this week.
- Apply for your Maternity Exemption Certificate (MatEx) for free NHS prescriptions and dental care.
- Tell your employer you're pregnant when you're ready — legally you must tell them by 15 weeks before your due date.
- Start researching maternity pay — check if you qualify for SMP or Maternity Allowance.
Tip of the Week
You can now apply for your Maternity Exemption Certificate (MatEx) for free prescriptions and dental care.
Frequently Asked Questions for Week 12
How many months is 12 weeks pregnant?
What size is the baby at 12 weeks?
What are the common symptoms at 12 weeks pregnant?
Is 12 weeks in the first trimester?
Are there any NHS appointments at 12 weeks?
Is 12 weeks the end of the first trimester?
When is the 12-week scan in the UK?
Can symptoms ease at 12 weeks pregnant?
Tools & Calculators
Sources and further reading
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