Going to Get My First Period
Although there’s no way to pinpoint the day, most girls reach menarche at about the same age as their mothers and older sisters did. Prepare yourself in advance. Buy a box of sanitary pads and have someone, for example your mom, show you how to wear them.
You mom can explain that your menstruation may be highly irregular at first, with as many as six months passing between periods. Even once a girl becomes regular, any of a number of conditions can cause you to miss a cycle: sickness, stress, excessive exercise, poor nutrition and, of course, pregnancy.