Definition Your period, otherwise known as menstruation, happens once a month (sometimes more or less if you have an irregular cycle). It's basically the discharge of blood that happens in non-pregnant females when the lining of your uterus and the unfertilized egg sheds itself. Even though it seems like a lot of blood, you only lose approximately four to six tablespoons (maybe more, depending on your body). Tissue and water make up the rest of the stuff that comes out. To see what happens during your cycle click here.
Slang Some common phrases/words used to describe menstruation: Aunt Flo, Big Red, the rag, being on the rag, the curse, a friendly visitor, the dot, etc...
