Menstruation or period is when there is an amount of blood coming out from a uterus through vagina on a monthly basis. The cause of the bleeding is due to the egg does not have chance to fertilize with a sperm cell. Then it comes out from the body with tissue. The blood is not from any part of your body.

The first period starts when a girl reaches age about 11 – 15. The development of the brain, genetics, and physical and mental health condition of each individual determine when the period will start.

Starting counting from the first day of the period to the day before the start date of the period of the next month. Generally, the cycle of a period is about 28-30 days, but it can vary according to health condition, mood and environment. Some ladies may be shorter or longer than the average.