Duty of Women with Irregular Periods
Issue No.474-A woman with an irregular period is a woman who has seen blood for some months, but has not developed a fixed menstrual period in both number and time. If such a woman sees blood for ten days or less, all of it is treated as ḥayḍ, and if she sees blood for more than ten days, if for some days the blood has the signs of ḥayḍ and that period is not less than three days or more than ten days, it should be treated as ḥayḍ. If however, all of the blood is of the same nature, she should consider the number of the days of the menstrual period of her kinswomen as that of her own provided that almost all of them have the same period. However, if they are different in their periods, the obligatory precaution is to consider seven days in every month as her menstrual period.