Pregnancy
2 min read · 1 min summary

Third trimester: weeks 28 to 40

The last stretch brings big changes. Mia helps you get ready and know when to call.

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Third trimester

In short

01

Baby grows fast

Baby puts on weight and gets into position for birth, often head down.

02

Know the movements

Learn your baby’s usual pattern and call the same day if it changes.

03

Get ready

Finish your birth plan, pack your bag and plan the journey to your birth place.

04

Call if

You have bleeding, severe headache, vision changes, sudden swelling or itching on your hands and feet.

Your baby in the last weeks

From week 28 your baby gains weight quickly, builds fat and gets ready to breathe and feed. Most babies settle head down by week 36.

Babies keep moving right up to and during labour. Movements may feel different as space gets tight, more rolls and pushes than kicks, but they should not slow down.

How your body feels

You may feel heavier, short of breath, and need to pee often. Heartburn, swollen ankles, back ache and poor sleep are all common.

Rest with your feet up, eat smaller meals and sleep on your side with a pillow between your knees. Ask for help with lifting and long days.

Why side sleeping matters

Research has linked going to sleep on your back after 28 weeks with a higher risk of stillbirth. Going to sleep on your side, either side, is safer.

If you wake up on your back, do not worry. Just turn onto your side and go back to sleep.

Getting ready for birth

Finish your birth plan and talk it through with your midwife. Pack your hospital bag by week 36, and plan how you will get to your birth place.

Learn the signs of labour, and know who to call and when. Practise your breathing and positions so they feel familiar.

If your baby is late

Many first babies arrive after their due date. Your midwife may offer a membrane sweep from around 39 to 41 weeks.

If labour has not started by around 41 weeks, you will be offered induction. You can also choose to wait with extra monitoring. Ask about the risks and benefits of each.

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

Sources: NHS: Weeks 28 to 40 · Tommy’s: Sleep on side campaign · NICE guideline NG207: Inducing labour

Good to know

Is it normal to feel more tired?

Yes. Rest when you can and accept help.

Why is sleeping on my side advised?

Research links going to sleep on the back in late pregnancy with a higher risk of stillbirth. Side sleeping is safer.

What if my baby is breech?

Your midwife may offer a procedure to turn baby (ECV) around 36 to 37 weeks, or talk about a planned caesarean or vaginal breech birth.

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