Periods can seem like a big mystery when you first hear about them, but they are a normal and natural part of growing up for girls. A period, also called menstruation, is one way the body prepares for the possibility of pregnancy. For girls who are starting to go through puberty, it is important to understand what a period is, why it happens and how the cycle works. https://sites.google.com/view/health-womens-health/understanding-period-and-its-cycles