Another thought for gals having heavy bleeding NOT due to PCOS. I've found out that von Willebrand Disease, a usually mild bleeding disorder runs in both My family AND my husband's! THankfully, I do not have it (there are no carriers, if you have the gene, you have the disease, it is not carried on the x chromosome like hemophilia.) But my dh has it, and so do both of our boys. It is the most common bleeding disorer and is thought to affect 2-4% of ALL people, no more or less common in any race or nationaliuty. Men w/ this disorder do not typically have problems, perhaps frequent nosebleeds (dh and boys have NO symptoms, found out b/c dh's brother had a bad clotting time prior to surgery adn the whole family was tested) but WOMEN w/ this disease will often have heavier periods that often last longer than average. This leads to anemia, tiredness, etc. ANyway, I think more awareness about this common disorder needs to raised.
There is a nasal spray that women can use once before or right after their period starts that could stop the heavy period problem if vWD is the reason for it.