CHARTS AND CALCULATORS
1. What was the first day of your last menstrual period (first day of bleeding?)
2. What is you’re an average cycle length (from first day of your menstrual period to the first day of your next period)?
Estimated conception of the date: First day of last menstrual period + 15 days. So, if your period started on May 1, then your estimated conception due date would be: May 16.