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BumpStories
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Week 40 of Pregnancy

Your baby is the size of a Watermelon

20.2 in (51.2 cm)122.1 oz (3460 g)
Third Trimester

Baby Development This Week

Your due date is here! Baby is fully developed and ready to meet you. Average baby is about 20 inches long and 7.5 pounds.

What You Might Be Feeling

You might feel anxious, excited, or impatient. Braxton Hicks may intensify. Rest as much as possible.

Medical Appointments and Tests

This is your due date! Only about 5% of babies arrive exactly on their due date. Your provider will discuss options if you go past this point.

Frequently Asked Questions

How big is my baby at 40 weeks pregnant?

At week 40, your baby is about the size of a watermelon — approximately 20.2 inches long and weighing about 122.1 ounces.

Is 40 weeks full term?

Yes, 40 weeks is considered full term. Your baby is fully developed and ready to be born.

What should I expect at 40 weeks pregnant?

At 40 weeks, your baby is the size of a watermelon. Every pregnancy is different, but common experiences at this stage include physical changes, new symptoms, and exciting developmental milestones for your baby.

Want to know your due date?

Get your personalized pregnancy story card with milestones, zodiac sign, and more.

Calculate Your Due Date
Note: This calculator provides estimates based on standard medical formulas. Please consult your healthcare provider for personalized guidance.