http://infertilityblog.blogspot.com/2006_03_01_archive.html"So when most people hear this for the first time they worry that they have it, and it’s their cause of infertility. Rest assured this is usually not the case. First, of the 10% of people who have it, the vast majority of them don’t have enough of it to cause any problem at all. They may have a spot the size of a dime in their ovary or in those other places, but its not enough to cause any of the problems listed above, including infertility. Second, there is a lot written about the ability of even a small amount of endometriosis to cause problems with ovulation, fertilization, embryo quality and implantation. There are not enough facts in the literature to support any of this, and most doctors today believe the only way endometriosis causes infertility is by causing scar tissue that interferes with tubal function. Some doctors like to perform a laparoscopy on every infertility patient, using the excuse that 10% of women have endometriosis, so we need find it and annihilate it. This is over operating, and fruitless. Other tests can be performed to look for endo, including an ultrasound and hysterogram. If these two tests are nomal, a laparoscopy may be indicated in only a small percentage of cases. A typical indication for laparoscopy will be discussed in the next entry."