Pregnancy week by week / Week 17
17 weeks pregnant
That’s 4 months — the second trimester, with 23 weeks to go.
Baby size at 17 weeks
Your baby is about 13 cm (5.1 in) long and weighs about 0.14 kg (5 oz) — roughly the size of a turnip.
What’s happening at 17 weeks
Fat stores begin to form and the skeleton is changing from soft cartilage to bone. The umbilical cord is growing stronger and thicker.
Common symptoms at 17 weeks pregnant
- •Baby movements
- •Stretch marks may appear
- •Vivid dreams
- •Growing bump
- •Increased appetite
Every pregnancy is different — you may have all, some or none of these. Contact your doctor or midwife about anything that concerns you.
Count down to your due date
If you’re 17 weeks pregnant today, your due date is around Tuesday, November 24, 2026. Adjust the date below and create a free countdown to share.
First day of your last menstrual period (how doctors date a pregnancy)
⚕️ This is an estimate based on Naegele’s rule (40 weeks from your last period). Only about 1 in 20 babies arrive on the exact due date. Always confirm with your doctor or midwife.
FAQ
How many months is 17 weeks pregnant?
17 weeks pregnant is about 4 months, in the second trimester.
How big is the baby at 17 weeks?
At 17 weeks the baby is about 13 cm (5.1 in) long and weighs about 0.14 kg (5 oz) — roughly the size of a turnip.
What are the symptoms at 17 weeks pregnant?
Common symptoms around 17 weeks include baby movements, stretch marks may appear, vivid dreams, growing bump. Symptoms vary a lot from person to person — contact your provider if anything worries you.
When is my due date if I am 17 weeks pregnant?
If you are exactly 17 weeks pregnant today, your estimated due date is around Tuesday, November 24, 2026 — 23 weeks from now. Use the calculator below with your real last-period date for a personalised estimate.
See every stage on the pregnancy week-by-week guide or open the full due date calculator.