In women of childbearing age, the most common cause of iron deficiency anemia is a loss of iron in the blood due to heavy menstruation or pregnancy. A poor diet or certain intestinal diseases that affect how the body absorbs iron can also cause iron deficiency anemia.
Direct democracy (also known as pure democracy) is a form of democracy in which people decide (e.g. vote on, form consensus on) policy initiatives directly. This differs from the majority of modern Western-style democracies, which are indirect democracies.
An example of indirect democracy is when we elect people to Congress to represent us. An example of direct democracy is the initiative or referendum process. This is similar to the process by which California banned gay marriages last year.