25 Weeks Pregnant
Reviewed by Safi Allah Khan
Medically reviewed by: Safi Allah Khan · Written by the Momi team · Last updated 20 October 2026
Quick answer: At 25 weeks pregnant, your baby is about the size of a rutabaga (swede), about 34.6 cm (13.6 in) long. You're in the second trimester, in month 6, with 15 weeks to go until your due date. This week's milestone: responds to familiar voices. Symptoms vary from person to person.
| Week 25 at a glance | |
|---|---|
| Trimester | Second |
| Month | 6 |
| Weeks to due date | 15 |
| Baby's size | About the size of a rutabaga (swede) |
| Length | About 34.6 cm (13.6 in) |
| Weight | About 660 g (1.5 lb) |
| This week | Responds to familiar voices |
Sizes are typical averages. Before about 20 weeks, length is measured crown to rump; after that, head to heel.
Your baby at 25 weeks
Your baby is about the size of a rutabaga (swede) and weighs about 660 g (1.5 lb). The baby can respond to familiar sounds, such as your voice, with movement.
Your body at 25 weeks pregnant
Sleep may be harder as your bump grows. Leg cramps at night are common in the second half of pregnancy.
Things to do this week
- Attend your 25-week appointment if it's your first baby (UK).
- Stretch your calves before bed to help with cramps.
- Start thinking about your birth preferences.
When to call your doctor or midwife
Contact your care team straight away if:
- your baby's movements slow down or change once you've started feeling a pattern, or you haven't felt any movement by 24 weeks
- you have a severe headache, vision changes, pain just below your ribs, or sudden swelling of your face, hands or feet (possible signs of pre-eclampsia)
- you have regular contractions, pelvic pressure or a low, dull backache before 37 weeks
- you have bleeding or fluid leaking from your vagina
- you have a fever of 100.4°F (38°C) or higher
If something feels wrong, trust that feeling and call. In an emergency, call your local emergency number.
Track week 25 in Momi
Write down birth preferences as diary notes in Momi so you have them ready for your next visit. Momi follows your pregnancy week by week with your baby's size and development, and keeps your diary, bump photos, appointments, kick counts and contractions in one place.
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Keep reading
← 24 weeks pregnant · All weeks · 26 weeks pregnant →
Sources
- ACOG: Changes During Pregnancy (infographic)
- NHS: Your baby's movements
- NHS: Antenatal care and appointments
- CDC: Urgent Maternal Warning Signs
Medical disclaimer: Momi and this website provide general information, not medical advice. Always talk to your doctor or midwife; in an emergency call your local emergency number.
FAQ
How big is a baby at 25 weeks pregnant?
On average, a baby at 25 weeks is about the size of a rutabaga (swede): about 34.6 cm (13.6 in), about 660 g (1.5 lb). These are typical averages, and healthy babies vary.
How many months is 25 weeks pregnant?
25 weeks pregnant is in the sixth month of pregnancy and the second trimester. Months don't divide evenly into 40 weeks, so different sources may label the month slightly differently.
What should I do at 25 weeks pregnant?
Attend your 25-week appointment if it's your first baby (UK). Stretch your calves before bed to help with cramps.
Related guides
Track this in Momi
Momi is a free pregnancy tracker app for iPhone and Android that follows pregnancy week by week, estimates the due date, and keeps a pregnancy journal, weight log, kick counter and contraction timer in one place.
