# 34 Weeks Pregnant: Baby Size, Symptoms & What to Expect | Clever Mum

> 34 weeks pregnant — your baby is the size of a cantaloupe melon. What's developing, what you might feel, and what to focus on this week.

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Third trimester

 
#  34 weeks pregnant

 

Your baby is about the size of a cantaloupe melon 

   [ CP ](/authors/parenting-desk/)  
 By [ Clever Mum Parenting ](/authors/parenting-desk/) · Parenting guides 

 
 Published 11 July 2026  

      
 
Quick answer — What happens at 34 weeks pregnant? 

 
At 34 weeks pregnant, your baby is about the size of a cantaloupe melon, roughly 45cm and around 2100g. The baby's central nervous system and lungs are maturing well.

    
Who should skip this

 
Skip this page if you need personal medical advice — it is general NHS-aligned information, not a substitute for your midwife. If your baby's movements slow or change, call your maternity unit, not a website.

    
## How big is the baby at 34 weeks pregnant?

 
At 34 weeks pregnant, your baby is about the size of a cantaloupe melon, roughly 45cm and around 2100g. The baby's central nervous system and lungs are maturing well. If born now, most babies do well with support. The waxy vernix on their skin thickens. These are typical averages — your midwife's measurements are the ones that matter for your pregnancy.

 
## What might you feel at 34 weeks?

 
Most people at 34 weeks notice some mix of the symptoms below — and plenty notice none of them. You may notice more pelvic pressure as the baby descends. Swelling, piles and tiredness can peak. Practise your breathing or relaxation techniques. None of this is a diagnosis; contact your midwife if something worries you.

  
### Common symptoms this week

 
 * Pelvic pressure as the baby descends
* Peak swelling and tiredness
* Stronger Braxton Hicks
 
 

Symptom lists are typical, never exhaustive — and having none of them is normal too.

  
## What should you do at 34 weeks pregnant?

 
The useful job this week is practical, not medical. Confirm your plans for getting to hospital and who your birth partner will contact. Keep your maternity notes with you at all times from now. Pair it with the NHS week-by-week guide if you want a second description of the same stage.

    
### Week 34 checklist

 
 * Attend your 34-week appointment
* Confirm the route and parking plan for your maternity unit
* Practise breathing or relaxation techniques from your classes
 
   
## What else is useful at 34 weeks?

 

Use the week page for size and symptoms; use the guides below for the decisions that
                actually sit in this window — pay, packing, car seats, labour signs.

 
 *  [Due date calculator](/tools/due-date-calculator/) 
*  [Trimester to-do list](/pregnancy/pregnancy-to-do-list-by-trimester/) 
*  [Maternity leave and pay](/pregnancy/maternity-leave-and-pay-uk/) 
*  [Best infant car seats](/best/best-car-seats-uk/) 
*  [Hospital bag checklist](/pregnancy/hospital-bag-checklist-uk/) 
*  [Signs of labour](/pregnancy/signs-of-labour-what-to-expect/) 
 
    
## 34 weeks pregnant: common questions

    What should my birth partner know before labour?   
 Where the notes and hospital bag live, the maternity triage number, the route and parking at the unit, your birth preferences (and where you're flexible), and how you want to be supported — advocacy, silence, snacks, or all three. A 20-minute conversation now beats improvising at 3am. 

   How big is my baby at 34 weeks pregnant?   
 At 34 weeks, your baby is approximately the size of a cantaloupe melon, about 45cm and around 2100g. These are approximate averages — every baby grows at its own pace. 

   What's happening at 34 weeks pregnant?   
 The baby's central nervous system and lungs are maturing well. If born now, most babies do well with support. The waxy vernix on their skin thickens. For you: you may notice more pelvic pressure as the baby descends. swelling, piles and tiredness can peak. practise your breathing or relaxation techniques. 

   Which trimester is 34 weeks?   
 34 weeks pregnant is in the third trimester. The first trimester runs to the end of week 12, the second from weeks 13 to 26, and the third from week 27 to birth. 

     
## 
Sources & further reading

 
 *  [ You and your baby at 4 to 40 weeks pregnant ](https://www.nhs.uk/pregnancy/week-by-week/)  — NHS 
*  [ Your baby's movements ](https://www.nhs.uk/pregnancy/keeping-well/your-babys-movements/)  — NHS 
 
   [← 33 weeks](/pregnancy/week/33/) [All weeks](/pregnancy/week/) [35 weeks →](/pregnancy/week/35/)  

This is general information, not medical advice — every pregnancy is different. For
          anything that worries you, and for all your antenatal care, speak to your midwife or GP.
          If your baby's movements ever slow down or change, contact your maternity unit
          immediately, day or night. Reviewed August 2026.

    
## Week 34 at a glance

   Trimester Third trimester  Baby size cantaloupe melon  Approx length ~45cm  Approx weight ~2100g  Weeks to go 6 (to 40)     
Work out your dates

 

Not sure how many weeks you are? Our
[due date calculator](/tools/due-date-calculator/)
maps your weeks and trimester dates from your last period.