25 weeks pregnant
Your baby may jump at loud noises.
In short
At 25 weeks your baby is about the size of a courgette, around 33.7 cm long and 778 g. Your baby may jump at loud noises.
- Second trimester, week 25 of about 40.
- Most antenatal classes start between 26 and 32 weeks. If you haven't booked yet, contact your maternity unit now.
Turn your baby round in 3D every week in the free Lullagram pregnancy section
Your baby responds to touch, sound and your voice by moving. A sudden loud noise can make them jump and kick, which is called the startle response.
How big is my baby at 25 weeks?
At 25 weeks your baby is about the size of a courgette, around 33.7 cm long and 778 g. 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 25 weeks?
- Your baby responds to touch, sound and your voice by moving.
- A sudden loud noise can make them jump and kick, which is called the startle response.
- Hiccups may show up as little rhythmic jerks you can feel.
- Around now the eyelids open for the first time and blinking comes soon after.
What changes for me at 25 weeks pregnant?
- Heartburn and indigestion are common as your baby takes up more room.
- Some swelling of your feet and ankles is normal, especially at the end of the day.
- There's no set number of kicks to count, but if movements slow down, change or stop, contact your maternity unit straight away.
What is a good tip for this week?
Smaller meals, sitting upright while you eat and cutting back on caffeine can ease heartburn.
What can a partner do this week?
Talk and sing to the bump and see if your baby answers with a wriggle.
What should I know in Ireland at 25 weeks?
- Most antenatal classes start between 26 and 32 weeks. If you haven't booked yet, contact your maternity unit now.
When to get help: Get help straight away from your midwife, GP or maternity unit if swelling appears suddenly or gets worse quickly or if one calf or leg is swollen and painful. 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.
I must say Lullagram has been a huge help in the house for the simple things. As most parents do, we take shifts at night and knowing what the baby drank and at what time helps during changeover. We both have access to the same account so I can see what my partner logged on the last feed without having to wake her. It also keeps track of everything for the PHN who thinks it's a great idea. There's loads of extras on it so it's definitely worth a punt.