Medical Disclaimer

DueDateTool.org provides educational information only and is not a substitute for professional medical advice, diagnosis, or treatment.

Always seek the advice of your healthcare provider with any questions you may have regarding your pregnancy, fertility, or reproductive health. Never disregard professional medical advice or delay seeking it because of something you have read on this website.

The calculators on this site provide estimates based on mathematical formulas. They are not diagnostic tools. Individual health assessment requires clinical examination.

Due date calculations are estimates based on established medical formulas. Only approximately 4-5% of babies are born on their exact estimated due date. Normal full-term delivery occurs between 37 and 42 weeks of gestation.

Individual factors such as irregular menstrual cycles, unknown conception dates, multiple pregnancies, and maternal health conditions can affect calculation accuracy.

Early ultrasound dating (8-13 weeks) is the most reliable method for establishing gestational age. Always confirm your due date with your healthcare provider through clinical examination and ultrasound.

About the Author

This site is authored by Emily Carter, RDN (Registered Dietitian Nutritionist) and IBCLC (International Board Certified Lactation Consultant), based in Portland, Oregon.

While Emily is a licensed healthcare professional, use of this website does not create a patient-provider relationship between you and Emily Carter or DueDateTool.org. Communication through this website does not constitute medical consultation.

Emergency Information

If you are experiencing a medical emergency, call 911 immediately or go to your nearest emergency room.

Signs of a pregnancy emergency include: severe abdominal pain, heavy vaginal bleeding, severe headache with vision changes, sudden swelling of face or hands, decreased fetal movement after 28 weeks, or signs of preterm labor before 37 weeks.