orald wrote:Probably got confused with the unused eggs and tissue(that one does become something in case it's fertilzed, no?) women bleed in their periods.
That's kind of right. Menstruation is the discharge of the endometrium, which is a substance that temporarily lines of the uterus in anticipation of fertilization. In the case that an egg is fertilized, this is the tissue that it will anchor itself to. If the egg is not fertilized before it becomes nonviable, the endometrium is shed. That is what the period is. Not sure that I remember correctly, but at that point I believe the egg has been completely absorbed by that tissue.