Endometriosis effects everyone differently. I myself was diagnosed almost 8 years ago and have had 3 surgeries for it. I also had a very difficult time getting pregnant. It took us over 3 1/2 years, even with the help of fertility treatments. We were finally successful with our first round of IVF and had twins!! I have tried over 10-15 types of birth control in my life and have not found one that works for me. So when I got married we knew we wanted kids and it would be difficult for us to conceive so I went off birth control completely. Even after having my twins I have not gone back on birth control. I have a friend who was also diagnosed with Endometriosis and was able to conceive after coming off the pill in a few short weeks. She has been on birth control for 14-15 years. She has had surgery twice.
I recommend the surgery. Yes, it can be scary. But it is worth it, even for the few short months of being pain free. If she is at a point where she would be happy starting a family pregnancy is a great thing for Endo. There is currently no cure but this helps so much for some women. I have only had a few periods since I breast fed my boys for several months, but the ones that I have had have been pain free, but still very heavy. There is also additional medication she can do after the surgery called Lupron. Thoughts and feedback about that could go on as well. It is another one of those things that effect everyone differently.
I could go on and on. Have your friend email me at ____@____.com if she has any additional questions or would like more feedback.