What is the ruling on the fasting and prayer of a woman who experiences bleeding that does not have the usual characteristics of menstruation, and then this bleeding intensifies to become normal menstruation on subsequent days? And does she have to make up for the entire duration of the bleeding or only from the time it intensified?

If the duration of blood seen by a woman does not exceed fifteen days, and the brownish discharge (kudra) is continuous with it, then it is considered menstruation, and she must make up the fast of these days. However, if the blood continues for more than fifteen days, then what corresponds to her usual period or is distinguished by the characteristics of menstrual blood is considered menstruation, and anything else is considered irregular bleeding (istihada). She is only required to make up the days counted as menstruation.