Can endometriosis cause pain in the ovary?

Yes. It can cause pain anywhere in the belly or pelvis, in the middle, right left. The pain can be all the time or just at certain times, may be worse with periods and even sex. Endometriosis pain cause be unpredictable.
Anywhere in pelvis. Although endometriosis implants are often found at the bottom of the pelvis as well as on the uterus and ovaries, the pain can be poorly localized and located anywhere in the pelvis. Many endometriosis patients have no pain at all and some with minimal disease have severe pain. In many respects this disease is still not well understood.