During puberty girls begin having a menstrual period, which is a monthly discharge of blood, secretions, and tissue debris from the uterus.a The menstrual period is usually accompanied by cramps as well as a drop in hormone levels. Since this has both physical and emotional effects, the onset of menstruation can be quite startling. “All of a sudden, I had this whole new experience to deal with,” recalls Teresa, who is now 17 years old. “It messed up my emotions, and it hurt. And it came every month!”

There is no need to be frightened when you begin having your menstrual periods. After all, it is an indication that your body is functioning normally. In time, you will learn how to cope with the unpleasant aspects of your period. Some, for example, find that regular exercise decreases painful cramps. But everyone is different. You may discover that you drastically need to reduce physical activity during your period. Learn to “listen” to your body and give it what it needs.