Week 17: Building fat stores
You’re 17 weeks pregnant — about 23 weeks to go. Your baby is roughly the size of a pomegranate.
Size of
a pomegranate
Length
13 cm
5.1 in · crown to rump
Weight
140 g
4.9 oz
Your baby this week
Your baby starts laying down body fat, which will provide energy and warmth after birth. The umbilical cord is growing stronger and thicker.
Your body & how you might feel
Your centre of gravity is shifting as your bump grows, which can affect your balance. Some people notice their feet growing slightly.
Common symptoms at week 17
- Increased appetite
- Backache
- Dry or itchy skin
- Faster heartbeat
This week’s tip: Switch to supportive, flat shoes and be mindful on stairs — your shifting balance makes small slips more likely.
A gentle reminder: This is an estimate, not medical advice. Dates and figures are general guidance — every pregnancy is different. Your healthcare provider’s assessment, especially from an early ultrasound, always takes priority. Always speak with your provider about your pregnancy.
Week 17 FAQs
How big is the baby at 17 weeks?
At 17 weeks pregnant, your baby is roughly the size of a pomegranate, about 13 cm (5.1 in) long and around 140 g. These are typical averages — every baby grows at its own pace.
How many months is 17 weeks pregnant?
17 weeks pregnant is about 4 months, in the second trimester, with about 23 weeks to go until your due date.
What are common symptoms at 17 weeks?
Common experiences around week 17 include increased appetite, backache, dry or itchy skin, faster heartbeat. Symptoms vary widely — contact your provider if anything worries you.