If menstruation extends to fifteen days, does she pray and fast during it?

Question:
May Allah reward you. The listener, Umm Mashari from Hail, says: Honorable Shaykh, peace be upon you and Allah’s mercy and blessings. I am committed, praise be to Allah, to performing the prayer. However, I am confused when the monthly period comes after ten days or fifteen days. My question, Honorable Shaykh, is: Is this blood menstruation or something else? And do I fast and pray during these days?

Answer:
The blood of the custom varies among women; its minimum is one day and night, and its maximum is fifteen days. If it is your custom for the blood to continue for ten days or more, up to fifteen days or less, then this is considered menstruation. You leave off the prayer and fasting for its sake, and you make up the obligatory fasting afterwards. Yes.