26 Weeks Pregnant: Baby Size, Symptoms and UK Milestones
At 26 weeks pregnant, use this UK guide to understand baby size, common symptoms, likely NHS timing, and the practical dates to keep on your radar.
26 weeks pregnant at a glance
- You are in the second trimester.
- Your baby is roughly the size of a spring onion.
- Routine midwife check.
- Every pregnancy is different, so don't worry if your experience varies slightly.
You are 26 weeks pregnant and in your second trimester. Your baby is about the size of a spring onion. This week's key development: Eyes Opening. NHS note: Routine midwife 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.
If you have symptoms, concerns, or questions about your pregnancy, speak to your midwife, GP, or maternity team. For urgent help, use NHS 111; call 999 in an emergency. Read how we source and review content in our editorial policy.
Baby's Development
Your baby is about the size of a spring onion.
Eyes Opening — Your baby's eyelids, which have been fused shut, are beginning to open. Their eyes are now sensitive to light, and they may respond to a bright light shone on your belly. Brain wave activity for both hearing and sight is now detectable.
Your Symptoms
- Higher blood pressure
- Backaches
- Insomnia
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 midwife check. They will check your fundal height and baby's position.
Practical Advice for Week 26
Nutrition
- Continue vitamin D daily.
- Vitamin A is important but avoid liver products which contain dangerously high levels.
- Eat plenty of colourful fruits and vegetables for antioxidants.
- Include oily fish for DHA — essential for your baby's developing eyesight.
Exercise
- Consider prenatal yoga or aqua natal classes — both are excellent in the third trimester lead-up.
- Practise good posture — your spine is under increasing pressure.
- Avoid lying flat on your back — use an incline or lie on your side.
- Pelvic tilts and cat-cow stretches ease back tension.
Wellbeing
- Your baby's eyes are opening — they can now see light through your belly.
- Insomnia may worsen — establish a calming bedtime routine.
- Back pain is common — a warm (not hot) wheat bag can help.
- Start thinking about your birth environment — what makes you feel safe and calm.
Preparation
- Start writing your birth plan — your midwife can help you refine it.
- What kind of pain relief interests you? Gas and air, water birth, epidural, or hypnobirthing?
- If you want a home birth, discuss it with your midwife — it's an option for low-risk pregnancies.
- Ensure your car seat is compatible with your car.
Tip of the Week
Start thinking about your birth plan. What kind of pain relief or environment would you prefer?
Frequently Asked Questions for Week 26
How many months is 26 weeks pregnant?
What size is the baby at 26 weeks?
What are the common symptoms at 26 weeks pregnant?
Is 26 weeks in the second trimester?
Are there any NHS appointments at 26 weeks?
Tools & Calculators
Sources and further reading
Checked for UK week 26 pregnancy information guidance in July 2026.
- NHS Pregnancy Guidance
- NHS: Ultrasound scans in pregnancy
- NHS Start for Life: Pregnancy
- RCOG patient information
We prioritise official NHS and GOV.UK guidance, then relevant professional-body information where needed.
Source links are checked on the review date shown above. Your midwife, GP, maternity team, fertility clinic, or employer can give advice that is more specific to your circumstances.
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