This is because a girl's hormones might already be active. Although it may look like a lot of blood, a girl usually only loses a few tablespoons of blood for the whole period. Many parents feel awkward talking about periods, especially with pre-teen girls, who can seem to get easily embarrassed. The built-up lining is ready for a fertilized egg to attach to and start developing. See all current offers. This gets the uterus ready for an egg from the mom and sperm from the dad to attach and grow into a baby. Women also won't have a period while they are pregnant.
That is why most girls and women get their periods around once a month.
All About Periods
It is a sign that she is getting close to the end of puberty. What if a girl never gets her period? Please enter friend's email adress Please enter your e-mail address. Actually, she may be your best friend during this time in your life. There isn't one right age for a girl to get her period. For the first few years after a girls starts her period, it may not come regularly. These hormones cause the lining of the uterus or womb to build up.