Two Categories of Menstruation Rulings
These rulings fall into two broad categories: rulings in the moment and rulings in retrospect. Understanding this distinction is essential when learning the rulings related to the possible days of menses, as it provides a framework for proper Islamic guidance during menstruation.
Rulings in the Moment
Rulings in the moment are the daily guidelines that tell a woman how to act when her bleeding starts or stops. They provide day-to-day direction—hour by hour and even minute by minute. Should she pray right now? Should she fast? Is sexual intimacy permissible? Is this bleeding menstruation or abnormal bleeding? At any given time, she acts according to the information available to her.
Because the future is unknown, a woman cannot always determine how long bleeding will continue. She can only assess her situation based on present circumstances. It is almost like assembling a puzzle. One piece is placed when she says, "Today I am seeing blood," and a ruling is applied accordingly. If the next day she sees no blood, another piece is placed, and a different ruling may apply. With each passing day, the picture becomes clearer.
Rulings in Retrospect
Rulings in retrospect are the retroactive rulings that come about when the details of a woman's circumstance change. They can overturn a ruling in the moment. As events unfold and more information becomes available, the overall ruling may change. Once the full duration and pattern of bleeding are known, the situation can be judged more accurately.
For example, if bleeding begins during the expected time of menstruation, it is treated as menses in the moment. However, if it stops before reaching seventy-two hours—the minimum duration in the Hanafi school—it is later ruled to have been abnormal bleeding. In retrospect, the initial assumption is adjusted.