First Condition: The Menstrual Minimum
The menstrual minimum is 3 complete days (72 hours). If the menstrual minimum is not met, then the bleeding cannot be ruled as menstruation. Rather, it is abnormal blood (istiḥāḍa).
Counting Three Complete Days
What is intended by a 'day' is a full day and its night, which is 24 hours. Three days of 24 hours equals 72 hours. The minimum days of menstruation will not be counted correctly if the 24-hour stipulation is overlooked.
Case Study Example:
A woman's menstruation starts on June 1st at 10 am. The menstrual minimum is met after 72 hours on June 4th at 10 am. If a woman is unaware of the 24-hour stipulation, she may mistakenly assume that the menstrual minimum is met on June 3rd.
Color of Discharge
Any color of vaginal discharge seen within this time takes the ruling of menses, regardless of whether it is red, brown, fresh yellow, or the like. What marks the beginning of menstruation is the first show of colored discharge within the possible days of menses, and it is not necessarily when a red color is seen or when the full flow starts. Understanding different period blood colors is essential for proper identification.
Spotting Versus Continuous Flow
Bleeding does not need to be continuous for it to be ruled as menstruation. The real consideration returns to the beginning and ending times of the shows of blood.
If the total duration from the first show of blood to the last show of blood reaches 72 hours, the entire time span is considered menstruation in hindsight, regardless of whether a woman saw blood for the total duration.
Real-Life Scenario 1:
A woman begins to bleed on Friday at 10 am during her expected time of menses. The bleeding finishes on Monday at 10 am. From the time the blood begins to the time it ceases, there is a duration of 72 hours. The entire time span of constant blood flow is considered menstruation.
Real-Life Scenario 2:
A woman sees a spot of blood on Friday at 10 am during her expected time of menses and then the blood stops. The bleeding returns on Monday at 10 am and stops at 11 am. From the time the blood begins to the time it ceases, there is a period of 72 hours; in fact, it is 73 hours. The entire time span is considered menstruation in hindsight. Whether she saw blood for the rest of Friday, Saturday, or Sunday is of no consideration according to the rulings.
This is significant for women who experience spotting when their menstruation starts. If the spotting of blood is seen during the time of expected menstruation and the duration reaches 72 hours, the spotting will count as menstruation.
Scholars explain that the reason it is not a condition for the bleeding to be continuous is because this is the nature of menstrual blood. It is normal and common for it to be an on-and-off flow.