Must I make up the Dhuhr and Asr prayers if my menstruation stopped after Asr, and nothing came down during sleep and upon waking after Fajr, knowing that I have performed ghusl and made up the Maghrib, Isha, and Fajr prayers?

The fatwa confirms that the default is for menstruation to continue until the woman ascertains her purity, and that purity has two signs: complete dryness or the white discharge (al-qassah al-bayḍā’). If purity is ascertained before the time of a particular prayer expires, then ghusl (ritual bath) is obligatory, and the prayer must be performed; it is not permissible to delay it for qada’ (making up). However, if purity is not ascertained until after the times of all prayers have expired, then she is not obligated to make up any of them. It is obligatory to make up the Dhuhr and Asr prayers if purity is ascertained before sunset, and it is obligatory to make up the Maghrib, Isha, and Fajr prayers if purity is ascertained before Fajr. In case of doubt about purity before Fajr, she is not required to make up any prayer.