What is the ruling on the prayer and fasting of a wife who experiences interruptions in her menstrual cycle, where the first four days were normal, then she began to notice a clear discharge followed by a return of blood until the twelfth day, bearing in mind that she has a cyst in her uterus?

If the bleeding, even if it is yellowish or brownish discharge, continues, it is considered menstruation as long as it does not exceed fifteen days. If it exceeds this period, it is considered istihadah (definition) (prolonged non-menstrual bleeding), and the woman must perform ghusl (definition) (ritual bath) and wudu' (ablution) for every prayer, and she may fast. She is considered ritually pure in terms of what is permissible and impermissible.