Another major change is that you will start getting your period. A period is when your uterus releases a small amount of blood and tissue through the vagina. This usually happens about once a month. Periods are part of a process your body goes through every month to prepare for the possibility of having a baby.
Getting your period is a natural part of growing up, and is a sign that your body is healthy and working properly. It means you are becoming a young woman who can have a baby in the future, if you choose to. For the first few years, periods may not happen every month, and that is normal. Eventually, they will start to come around the same time every month.
English 
हिन्दी