How big is the baby in week 25 of pregnancy?

In week 25, your baby is roughly 34.6 cm long and weighs about 660 g — about the size of cauliflower.

25 of 40 weeks

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Second trimester

Week 25

Hair is growing with real color and texture.

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Baby size this week

As lovely as a cauliflower

Measurements are averages — every baby grows at their own pace.

Length 34.6 cm 13.6 in

Weight 660 g 1 lb 7 oz

Your baby this week

Hair now has color and texture
Baby fat begins to fill out the skin
Your baby's hands are fully developed
The heartbeat can be heard with a stethoscope

Your body this week

Round ligament pain

Backache

Nasal congestion

Skin changes

A little list for week 25

This week's to-do

Ask your midwife about the glucose test if not booked Plan your prenatal class enrollment Sleep with a pregnancy pillow Take weekly bump photos

How we measure week 25

Pregnancy weeks are counted from the first day of your last menstrual period, following standard ACOG and NHS guidance. Sizes are crown-rump length in early weeks and head-to-heel from around week 20. Your care team may adjust dates after an ultrasound.

Continue to week 26

BumpCount offers general information and does not replace advice from your doctor or midwife.

Week 25

As lovely as a cauliflower

Your baby this week

Your body this week

This week's to-do

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