Week 33 Pregnancy

Third Trimester

Last reviewed: July 2026

33 weeks pregnant at a glance

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

You are 33 weeks pregnant and in your third trimester. Your baby is about the size of a pineapple. This week's key development: Putting on Weight. NHS note: Routine care.

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 32

Week 34

Baby's Development

Your baby is about the size of a pineapple.

Putting on Weight — Your baby is gaining around half a pound per week. The bones are hardening except for the skull, which remains flexible to ease the journey through the birth canal. You may be sleeping lightly and waking often — your body is preparing for the newborn nights ahead.

Pineapple

Approx. 43.7cm

Your Symptoms

Insomnia
Overheating
Carpal tunnel syndrome

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 care. Midwife checks baby's growth and your well-being.

Practical Advice for Week 33

Nutrition

Continue vitamin D daily.
Your baby is gaining about half a pound per week — eat well to fuel this growth.
Include zinc and selenium (Brazil nuts, shellfish, wholegrains) for immune support.
If appetite decreases because your stomach is compressed, eat little and often.

Exercise

Gentle exercise helps with insomnia and mood.
If carpal tunnel symptoms affect your wrists, specific stretches can help.
Walking in the fresh air is great for both physical and mental wellbeing.
Practise breathing and relaxation techniques for labour.

Wellbeing

Insomnia is very common in the third trimester — try a warm bath and no screens before bed.
Overheating at night — keep your bedroom cool and use layers you can remove.
Carpal tunnel syndrome can worsen — wrist splints worn at night can provide relief.
If you're struggling with anxiety about birth, hypnobirthing classes can be wonderfully calming.

Preparation

Routine midwife care — growth, position, and wellbeing check.
Finalise your hospital bag — include snacks, phone charger, and music.
Write down your birth partner's contact details for the hospital.
Research what to expect in the first 24 hours after birth.

Tip of the Week

Try a warm bath or reading before bed to help with pregnancy insomnia.

Frequently Asked Questions for Week 33

How many months is 33 weeks pregnant?

At 33 weeks pregnant, you are roughly 7 months pregnant. Remember that pregnancy is typically measured in weeks rather than months for clinical accuracy.

What size is the baby at 33 weeks?

At 33 weeks, your baby is roughly the size of a pineapple (about 43.7cm). Your baby is gaining around half a pound per week. The bones are hardening except for the skull, which remains flexible to ease the journey through the birth canal. You may be sleeping lightly and waking often

What are the common symptoms at 33 weeks pregnant?

Common symptoms at this stage include insomnia, overheating, carpal tunnel syndrome. Remember that every pregnancy is unique, and it's normal to experience different symptoms.

Is 33 weeks in the third trimester?

Yes, 33 weeks falls within the third trimester.

Are there any NHS appointments at 33 weeks?

Routine care. Midwife checks baby's growth and your well-being.