Good question! I wish the answer were straightforward, but it isn't. Most women ovulate around day 14 of their cycle (day 1 being the first day of menstrual bleeding), but not always. Many things can influence the timing of ovulation, so you can't just depend on counting 14 days from your period. Some women develop a thick, clear, non-odorous vaginal discharge when they are ovulating; some women feel cramping; others have no symptoms. Taking your "basal" temperature can reveal the timing of ovulation: Take your temperature every morning while you're still lying in bed. When your temperature goes up, you are probably ovulating. Now, however, you can buy fairly reliable home ovulation kits in the drugstore. One final thought: If you are thinking of becoming pregnant, be sure to see your gynecologist for a preconception visit. He or she can make sure that everything is in order (immunizations, health status, silent infections, etc.) before you conceive. Also be sure to take 0.4 mg of folic acid (a B vitamin) every single day for months before you conceive, as this can prevent many birth defects. Read the label of the vitamin bottle to check the amount of folic acid.