Is it obligatory for a girl to inform her suitor about her irregular menstrual cycle before marriage?

Menstrual cycle irregularities not exceeding fifteen days are not considered a defect requiring disclosure. However, if the bleeding exceeds the maximum duration of menstruation (istihada - prolonged vaginal bleeding outside of the normal menstrual period), then it is a defect that prevents complete enjoyment, and the suitor must be informed. If the condition can be treated, then there is no need to inform the suitor.