What is endometriosis?: And how does it impact on a woman's fertility

Have you ever had period cramps so bad that you vomit? Perhaps you or a sister has had to miss a day or more of work or school because you couldn't walk due to severe back pain? You may have heard a girlfriend or colleague talk about suffering from headaches, neck pain and fatigue that has kept them hidden in a dark room for days. These are just a few of the symptoms of Endometriosis affecting 1 in 10 women worldwide.