Endometriosis is a very common gynaecological condition which can affect up to 15 percent of all women. Half of all women with endometriosis will be infertile. After fibroids, endometriosis is the most common gynaecological problem. The National Endometriosis Society estimates that between 1.5 and 2 million women in Britain have endometriosis. In the US that number is closer to 5 million. In.....