Pregnancy Conception Calculator
HealthEstimates the date of conception based on the due date or last menstrual period (LMP).
How to use this calculator
Start with your values, or try a preset.
Enter Calculate Conception Date Based On, Due Date, Last Menstrual Period (LMP), and Average Menstrual Cycle Length (days) in the units shown.
Read Estimated Conception Date and Gestational Age (Weeks) in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
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