Pregnancy
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First trimester: what to expect

The first trimester can feel big and quiet at the same time. Here is what is common, what helps, and when to call someone.

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First trimester

In short

01

Common symptoms

Tiredness, nausea, tender breasts and needing to pee more are very common.

02

Nausea

Small, regular snacks and sips of water can help. If you cannot keep anything down, call your midwife or doctor.

03

Your first scan

The dating scan is usually offered around weeks 10 to 14.

04

Call if

You have heavy bleeding, strong one-sided pain or feel very unwell. Get help the same day.

What is happening in your body

Pregnancy hormones rise fast in the first weeks. They support your baby but can leave you tired, sick, emotional and needing to pee more. Your breasts may feel full and tender.

Your baby goes from a tiny cluster of cells to a fully formed baby by week 12. The heart starts beating at around six weeks.

Nausea and sickness

Up to eight in ten pregnant people have nausea, often called morning sickness, though it can happen at any time of day. It usually eases by weeks 16 to 20.

Small, frequent snacks, plain foods, sips of water and rest can help. Ginger helps some people. If you cannot keep food or drink down, or you feel faint, you may have a more serious form called hyperemesis gravidarum. Call your midwife or GP, as treatment is available.

Tiredness and mood

Feeling exhausted is very common and is not a sign that anything is wrong. Go to bed early, say yes to help and lower the bar on everything else for a while.

Mood swings, worry and low days are common too. If you feel low most of the time, or anxious in a way that stops you living your life, tell your midwife. Mental health support is part of pregnancy care.

Your first appointments

Your booking appointment with a midwife usually happens by week 10. You will talk about your health, your history and your choices, and be offered blood tests.

The dating scan is offered between weeks 10 and 14. It checks your baby’s heartbeat, confirms your due date and can be combined with screening tests if you choose them.

Looking after yourself now

Take folic acid until week 12 and vitamin D throughout pregnancy, as advised in the UK. Avoid alcohol and smoking, and check any medicines with a pharmacist or doctor.

Gentle movement such as walking or swimming is good if you feel up to it. If you were active before, you can usually carry on with some changes.

Based on NHS guidance on the first trimester and NICE antenatal care guidance. Mia teaches. Your midwife knows you best.

Sources: NHS: Weeks 1 to 12 · NHS: Vomiting and morning sickness in pregnancy · NICE guideline NG201: Antenatal care

Good to know

What should I take in early pregnancy?

In the UK, 400 micrograms of folic acid daily is advised before pregnancy and until week 12. Ask your midwife what suits you.

Is spotting normal?

Light spotting can be common but always tell your midwife. Call at once if bleeding is heavy or with pain.

When should I tell people?

That is up to you. Many people wait until after the 12-week scan, but some share earlier for support.

Is cramping normal?

Mild, period-like cramping can be common early on. Strong or one-sided pain, or pain with bleeding, needs a call the same day.

Can I drink coffee?

Yes, but keep caffeine under 200 mg a day, about two mugs of instant coffee.

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