40 Weeks Pregnant: What to Expect

At 40 weeks pregnant, your baby is the size of a watermelon. Learn about your baby's development, common symptoms, and helpful tips for this stage of pregnancy.

Week 40 Snapshot: 🍉 Baby is the size of a watermelon — 20.16 inches, 7.6 lbs
Week 40 of 40
Trimester Third Trimester
Baby Size 🍉 Watermelon
Baby Weight 7.6 lbs
Weeks Left 0 weeks
Progress 100%
Pregnancy Progress: 100% complete
T1 T2 T3
Week 40 0 days to go

Baby Development at Week 40

Key milestones and developments happening this week:

Common Symptoms at 40 Weeks

You may experience some or all of these symptoms during week 40:

Tips for Week 40

Nearby Weeks Comparison

See how your baby grows in the weeks around week 40:

Week Baby Size Length Weight Trimester
Week 36 Romaine lettuce 18.66 in 5.8 lbs Third Trimester
Week 37 Swiss chard 19.13 in 6.4 lbs Third Trimester
Week 38 Mini watermelon 19.61 in 6.8 lbs Third Trimester
Week 39 Pumpkin 19.96 in 7.2 lbs Third Trimester
← Week 39

What Happens at 40 Weeks Pregnant?

At 40 weeks pregnant, you are in the third trimester of your pregnancy. Your baby is about the size of a watermelon, measuring approximately 20.16 inches and weighing about 7.6 lbs. This is an exciting time as your baby continues to grow and develop new capabilities each week.

During week 40, your body is working hard to support your growing baby. The placenta continues to provide essential nutrients and oxygen through the umbilical cord. Your blood volume has increased significantly to support the pregnancy, and your body is producing hormones that help maintain the pregnancy and prepare for delivery.

With 0 weeks remaining until your estimated due date, you are 100% of the way through your pregnancy. Remember that a full-term pregnancy is considered 39 to 40 weeks, but babies can arrive anywhere from 37 to 42 weeks. Only about 5% of babies are born on their exact due date, so think of your due date as an estimate rather than a deadline.

Regular prenatal care is essential throughout your pregnancy. Your healthcare provider will monitor your baby's growth, check for any complications, and help you prepare for a healthy delivery. Do not hesitate to contact your provider if you experience any concerning symptoms or have questions about your pregnancy.

Frequently Asked Questions

How big is my baby at 40 weeks pregnant?

At 40 weeks pregnant, your baby is about the size of a watermelon, measuring approximately 20.16 inches. The baby weighs about 7.6 lbs.

What are common symptoms at 40 weeks pregnant?

Common symptoms at 40 weeks of pregnancy include loss of mucus plug, water breaking or slow leak of fluid, and regular contractions increasing in intensity. Every pregnancy is different, so you may experience all, some, or none of these symptoms. Contact your healthcare provider if you have concerns about any symptoms.

What trimester is 40 weeks pregnant?

At 40 weeks, you are in the third trimester (trimester 3 of 3). The third trimester spans weeks 27-40 and is when the baby gains most of its weight in preparation for birth.

How many weeks are left at 40 weeks pregnant?

At 40 weeks pregnant, you have 0 weeks remaining (0 days) until your estimated due date at 40 weeks. You are 100% through your pregnancy. Keep in mind that only about 5% of babies arrive on their exact due date.

Related Pregnancy Resources

← Pregnancy Week by Week | Health & Fitness Calculators