Baby Development at 40 Weeks Pregnant
Fruit / Vegetable Analogy
Crown to Heel (Total Length)
Fetal Weight Standard
WELCOME TO WEEK 40: YOUR ESTIMATED DUE DATE! Only about 4 to 5 percent of babies arrive precisely on their exact calculated due date, so do not be discouraged if your baby hasn't arrived yet.
Your baby is fully grown, plump, and healthy, with approximately 15 percent body fat. The placenta continues providing oxygen, antibodies, and nutrients as the biological countdown to delivery concludes.
Personalized Due Date Recalculator
Input your last menstrual period (LMP) to verify your exact week, remaining days, and estimated delivery date.
Disclaimer: Computational estimates are based on standard clinical algorithms (e.g., Naegele's rule) for educational and planning purposes only. They do not constitute formal medical evaluation, diagnosis, or clinical obstetrics advice.
Disclaimer: Computational estimates are based on standard clinical algorithms (e.g., Naegele's rule) for educational and planning purposes only. They do not constitute formal medical evaluation, diagnosis, or clinical obstetrics advice.
Maternal Symptoms & Clinical Guidance at Week 40
Common Physical Symptoms
- Anticipation, excitement, and impatience for labor to begin
- Cervix may be partially dilated and significantly effaced
- Frequent strong Braxton Hicks or early labor contractions
- Lower back pressure and heavy pelvis
Clinical Action Items
- Celebrate reaching your official 40-week Estimated Due Date milestone!
- Weekly prenatal checkup with non-stress test (NST) if scheduled
- Stay distracted with pleasant movies, gentle walks, and favorite meals
- Contact your care team immediately if your water breaks or movements decrease
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Frequently Asked Questions About 40 Weeks Pregnant
Only about 4 to 5 percent of babies are born precisely on their calculated due date. The vast majority of healthy babies arrive between 38 and 42 weeks of gestation.