Pregnancy due date Natural Standard Monograph, Copyright © 2011 (www.naturalstandard.com). Commercial distribution prohibited. This calculator is intended for informational purposes only, and should not be interpreted as specific medical advice. A qualified healthcare provider should be consulted before making decisions about therapies and/or health conditions.
First day of last period (mm/dd):
Average menstrual cycle length (days):
Results
Estimated conception date:   Estimated gestational age:   Estimated due date: