A woman is fertile only during part of her monthly cycle. That part is the time just before an egg enters the ovaries and while the egg is alive. You should learn when this time is. Then you can find out when you’re likely to be fertile. This tool gives times for women who have regular periods. Regular periods mean having a period every 21 to 40 days. Temperature tracking and test kits can also be used to help find out when a woman’s fertile time is. These are very useful if a woman has periods that are not regular. The date you enter in the tool may give a date that has already passed. This will happen if you are nearing the start of your next period.

This tool cannot be used as an aid to keep from getting pregnant. This tool is for education only. It is not meant to replace the care of a doctor. Always talk with your doctor for advice about your health.