35 weeks pregnant
Building up cosy baby fat.
In short
At 35 weeks your baby is about the size of a honeydew melon, around 46.3 cm long and 2.53 kg. Building up cosy baby fat.
- Third trimester, week 35 of about 40.
- The whooping cough vaccine is recommended up to 36 weeks. If you haven't had it, contact your GP this week, as there is still some benefit after 36 weeks.
Turn your baby round in 3D every week in the free Lullagram pregnancy section
Your baby is laying down fat, which will help them stay warm after birth. The lungs are getting close to being ready for their first breath.
How big is my baby at 35 weeks?
At 35 weeks your baby is about the size of a honeydew melon, around 46.3 cm long and 2.53 kg. Before about 14 weeks babies are measured from crown to rump; after that the figure is head to heel. These are typical figures from fetal growth charts. Your own baby may be bigger or smaller, and your scans are what count.
What is my baby doing at 35 weeks?
- Your baby is laying down fat, which will help them stay warm after birth.
- The lungs are getting close to being ready for their first breath.
- Your baby should still be moving as much as before, even though space is tight.
What changes for me at 35 weeks pregnant?
- You may notice yellowish marks in your bra from colostrum, the early milk that's rich in antibodies.
- Feeling heavy, tired and uncomfortable is very common now.
- Pelvic and back aches may increase as your baby grows.
What is a good tip for this week?
Think about how you'd like to feed your baby and ask your midwife what breastfeeding support your maternity unit offers.
What can a partner do this week?
Read up on feeding together so you can support whatever you decide.
What should I know in Ireland at 35 weeks?
- The whooping cough vaccine is recommended up to 36 weeks. If you haven't had it, contact your GP this week, as there is still some benefit after 36 weeks.
When to get help: It's not true that babies move less near the end of pregnancy, so if movements slow down, change or stop, contact your maternity unit straight away. HSE: when to get help.
Want these updates on your phone? The Lullagram app has a free pregnancy section with this week-by-week guide, Irish dates worked out from your due date, a contraction timer and more. When your baby arrives, the baby tracker is ready in the same app.
Guides for your pregnancy: pregnancy care in Ireland · maternity leave and benefit · hospital bag checklist · popular baby names · free IVF in Ireland · due date calculator
Sources and guidance
This page is written to be consistent with the official guidance below. It is general information for parents in Ireland, not medical advice. Links checked 23 September 2026.
Really good app. There are loads of additional extras outside the tracking but really helps if parents are taking night shifts and you want to see what has happened before you took over. The timing to let you know when the next feed potentially is also quite handy. loads of reports for the health nurse too. One stop shop for everything really.