How does Natural Cycles determine my conception date?
The conception date is the date of your last detected ovulation, as this is when conception occurred (when the sperm cell met the egg cell). Traditionally, conception dates are based on period data, however, since Natural Cycles detects based on your data when you ovulate, it is able to use the ovulation date as the true conception date.
Can I edit my conception date?
Please note that it is not possible to manually adjust your ovulation/conception date as the algorithm will place the ovulation based on the data that was added.
That being said, if there isn’t enough temperature data around your ovulation day or your temperatures have fluctuated too much, you can instead edit your due date, which will in turn change your pregnancy weeks and move the ovulation/conception date (to fit with the new information given from the edited due date). Find out how to edit your due date here.