Hi RandJ, I never knew I had endo and I had never been diagnosed with PCOS either.
The reason I had mine was to check for tube patency (make sure the fallopian tubes are clear and do not have any blockages stopping the little eggies from making there way down to the uterus) and to remove the tumors also known as fibroids - one of mine was the size of a golf ball.
As far as I know they like to do Lap surgery to make sure that everything is "in working order" and ready to roll. No point in putting a blasto or embie in if the uterus is not 100% clean and in working order - and the only way to confirm this 100% is to look at it physically. Ultrasounds don't show everything. And sometimes unexplained infertility can be something like blocked tubes.
hope this helps.

