Menstrual bleeding occurs when the endometrium sheds off.
True
During the menstrual cycle, an egg is released from one of the ovaries. The endometrial lining in the uterus thickens in which a fertilised egg could implant. If the egg is not fertilised by sperm, as is the case in most cycles, the endometrial lining of the womb breaks down and leaves the body - this is commonly known as having a period.