Menstruating for 2 weeks when do i ovulate?

Menstruation: vaignal bleeding can be ovulatory or anovulatory(where the woman does not ovuate). If the menses are regular (like very 28 or 30 days) then the woman is most likely ovulating. A common cause of having 2 weeks of menses is when a woman is not ovulating, but there are other causes of having prolonged menses. See your physician to determine why your menses is lasting 2 weeks.