Week 30 Pregnancy

Third Trimester

Last reviewed: July 2026

30 weeks pregnant at a glance

You are in the third trimester.
Your baby is roughly the size of a large cabbage.
Routine check.
Every pregnancy is different, so don't worry if your experience varies slightly.

You are 30 weeks pregnant and in your third trimester. Your baby is about the size of a large cabbage. This week's key development: More Baby, Less Room. NHS note: Routine check.

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.

Week 29

Week 31

Baby's Development

Your baby is about the size of a large cabbage.

More Baby, Less Room — Your baby is growing so quickly that the womb is becoming snug. Movements may begin to feel different — less rolling, more stretching and prodding. Your baby can now regulate their own body temperature to some degree.

Large cabbage

Approx. 39.9cm

Your Symptoms

Fatigue returns
Mood swings
Discomfort when sitting

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

Routine check. Midwife will check if the baby is head-down (cephalic).

Practical Advice for Week 30

Nutrition

Continue vitamin D daily.
Your baby is growing rapidly — maintain a protein-rich diet.
Omega-3 remains important for brain development in the final weeks.
If you're retaining water, reducing (not eliminating) salt may help.

Exercise

Gentle exercise helps combat the fatigue that returns in the third trimester.
Birth ball bouncing helps your baby into an optimal position.
Swimming is wonderful for relieving pressure on your pelvis and back.
If sitting is uncomfortable, try kneeling or using a birth ball at your desk.

Wellbeing

Third-trimester fatigue can feel as intense as the first trimester — nap when you can.
Mood swings may return as hormone levels change again.
If you're uncomfortable sitting, experiment with cushions and posture changes.
Practice mindfulness or hypnobirthing techniques to prepare for labour.

Preparation

Your midwife will check if baby is head-down (cephalic) — most are by now.
If baby is breech, don't worry — there's still time and options.
Ensure your hospital bag is packed and by the door.
Install the car seat and practice taking it in and out.

Tip of the Week

Nap when you can. The third trimester can be as exhausting as the first.

Frequently Asked Questions for Week 30

How many months is 30 weeks pregnant?

At 30 weeks pregnant, you are roughly 6 months pregnant. Remember that pregnancy is typically measured in weeks rather than months for clinical accuracy.

What size is the baby at 30 weeks?

At 30 weeks, your baby is roughly the size of a large cabbage (about 39.9cm). Your baby is growing so quickly that the womb is becoming snug. Movements may begin to feel different

What are the common symptoms at 30 weeks pregnant?

Common symptoms at this stage include fatigue returns, mood swings, discomfort when sitting. Remember that every pregnancy is unique, and it's normal to experience different symptoms.

Is 30 weeks in the third trimester?

Yes, 30 weeks falls within the third trimester.

Are there any NHS appointments at 30 weeks?

Routine check. Midwife will check if the baby is head-down (cephalic).