Duty of Menarcheal and Nāsīyah Women with Irregular Periods
Issue No.478-If menarcheal women, women with irregular periods, nāsīyah women and the women with a numerically fixed period, see blood with the signs of ḥayḍ, they must abandon acts of worship immediately, and if it becomes clear that it was not menses, they should make up those acts as qaḍā. However, if the blood does not bear the signs of ḥayḍ, they should act in accordance with the rules of istiḥāḍah until it is established that it is the blood of menses. However, women with a timely fixed period and those with a regular period must stop performing the acts of worship upon seeing blood during the days of their periods.