I would second what Susan M. said about the Pope Paul the VI Institute. I do not have endometriosis, but had some difficulty getting pregnant due to PCOS. I found a doctor locally who is very familiar with their methods and was wonderful in helping me get on the road to getting pregnant. I also called the Pope Paul the VI Institute for help and they were very knowledgeable. If you can make the trip, do it. My mother-in-law used to work with women who had a difficult time getting pregnant for a variety of reasons and several of them went there with good results. By the way, I believe they have a Catholic affiliation, but don't feel like you have to be Catholic to work with them.