I don't know how many people this will help but I think is pretty important for female IBS sufferers to look into. I have suffered with IBS (constipation) and all of the embarrassment and humiliation that comes with it for about 22 years now. I had noticed that the symptoms of the disease get worse right before and during my menstrual cycle. I found that Depo-Provera injections for birth control help to ease some of the symptoms so I have been getting them for the last 5 years. After my most recent flare up of uncontrollable flatulence, which made work very unpleasant, I made a same day appointment with a doctor I had never seen before to try to get my next 3-month Depo-Provera injection earlier; because my flatulence issues. The problem with the flatulence was that I did not feel gassy but my co-workers people at work sure noticed. When I described what was happening the doctor said that it sounds as if I was suffering from endometriosis and that it may have spread to my bowels (intestines). After doing some research it looks like this has been my problem for the last 22 years and no doctor recognized it except this one. Endometriosis symptoms often include IBS like symptoms.