Why do we have to have periods?

Okay so basically, periods happen because your body is getting ready to maybe have a baby someday, even if you don't want one right now. It's like your body's monthly reset button for that whole system.

Every month, your uterus builds up this super soft, cozy lining. It's kind of like preparing a little bed, just in case a fertilized egg (which could grow into a baby) shows up. But if no fertilized egg shows up, your body is like, "Well, no baby this month!" And so it doesn't need that cozy lining anymore. Your body sheds it, and that lining comes out as your period blood. It's just unneeded tissue and blood, and it's totally normal.

It's all controlled by these super important things called hormones. They pretty much boss your body around, telling it when to build the lining, when to shed it, and everything in between. So even though periods can be annoying sometimes, they're actually a really cool sign that your body is healthy and doing its thing!