Week 40: Meeting your baby
You’re 40 weeks pregnant — about at the finish line. Your baby is roughly the size of a small pumpkin.
Size of
a small pumpkin
Length
51.2 cm
20.2 in · head to heel
Weight
3.46 kg
122.1 oz
Your baby this week
It’s your due date! Only about 1 in 20 babies arrive exactly on time — many come a little before or after. Your baby is fully developed and ready for their first cuddle.
Your body & how you might feel
If your baby hasn’t arrived, your provider will talk through monitoring and options like membrane sweeps or induction if you go past your date.
Common symptoms at week 40
- Strong contractions
- Waters breaking
- Cervical changes
- Anticipation
This week’s tip: Going past your due date is common and usually fine — your provider will monitor closely. Hang in there; you’re so close.
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 40 FAQs
How big is the baby at 40 weeks?
At 40 weeks pregnant, your baby is roughly the size of a small pumpkin, about 51.2 cm (20.2 in) long and around 3.46 kg. These are typical averages — every baby grows at its own pace.
How many months is 40 weeks pregnant?
40 weeks pregnant is about 9 months, in the third trimester, with about 0 weeks to go until your due date.
What are common symptoms at 40 weeks?
Common experiences around week 40 include strong contractions, waters breaking, cervical changes, anticipation. Symptoms vary widely — contact your provider if anything worries you.