How can I estimate my conception date?

If you want to estimate when you conceived, you can use an ovulation calculator. Because it can be tricky to pinpoint exactly when ovulation happens, most conception dates are estimates based on your menstrual cycle. 

According to the American Pregnancy Association (APA), for a woman with a regular cycle, conception typically occurs about 11 to 21 days after the first day of her last period. Usually, only mothers who undergo special procedures like IVF or artificial insemination will know their exact date of conception.