Breaking Down Each Component
What Qualifies as 'Blood'
'Blood' refers to any colored vaginal discharge. As established in Islamic jurisprudence, menstrual blood can appear in various colors including black, red, brown, yellow, turbid, or green. There is no consideration for how heavy the flow is or if the physical symptoms of menstruation are experienced. Rather, whenever any of these colors are seen during the expected time of menstruation, it will be deemed menses.
Must Originate from the Uterus
'Originates from the uterus' means that the bleeding must come from the womb. For example, bleeding from an anal fissure or urinary tract infection is not menstruation because the blood is not coming from the uterus.
Moreover, for a woman who has had a total hysterectomy, any vaginal bleeding that she sees will never be considered menstruation because she no longer has a uterus.
Important Note: There is no need to check with a doctor about whether the blood seen at the time of menses is truly coming from the uterus. Unless a woman suspects otherwise, she can assume it does.
Must Exit the Vagina
'Exits out of the vagina' means that the colored discharge must exit the vagina for the ruling of menstruation to come into effect. According to the Sacred Law, exiting refers to when blood is seen at the edge of the vaginal opening.
Practically speaking, most women know that the blood exited when they see it on their panty liner or after wiping. If a woman extracts the blood herself with a tissue or a tampon, and the blood does not naturally flow out, this falls under the ruling of exiting the vagina.
If a woman feels cramps, but no bleeding exits, then what she feels is of no consequence. Blood must first exit the vagina for menses to start.
Age Requirement: At Least 9 Lunar Years
'Of a female who is at least 9 lunar years old' means that if a girl who is under the age of 9 lunar years old (approximately 8 solar years and 9 months) saw colored vaginal discharge, the bleeding is not considered menstruation. Rather, it is abnormal bleeding.
Medically speaking, most girls start to menstruate around 12 to 14 years of age.