Question

why do period of girl occur in 7 day of month​

Answer 1

Explanation:

Menstruation is the monthly shedding of the lining of a woman’s uterus (more commonly known as the womb). Menstruation is also known by the terms menses, menstrual period, cycle or period. The menstrual blood—which is partly blood and partly tissue from the inside of the uterus—flows from the uterus through the cervix and out of the body through the vagina.

Answer 2

Answer:

as it is a cycle of mensuration.