There is a 6 times higher risk of recurrence after hysterectomy if the ovaries are not removed. Risks of laparoscopy Keyhole surgery is generally very safe, especially in experienced hands, but it is important to be understand that any laparoscopy carries with it some degree of risk, as do all operations. When placing the laparoscope into the abdomen, there is a small risk of accidental injury to bowel, the bladder or blood vessels leading to haemorrhage - this risk is inherent in the procedure. It is greater if the surgery is more advanced involving dividing of adhesions, diathermy of endometriosis, removal of cysts, etc. Not all of these complications will have serious implications, but it might mean an unexpected open operation and a longer hospital stay.
Complications are more common where there has been multiple previous open surgeries.
Trimbos-Kemper T et al. Parthenon, Camforth, pp209-226 Marcoux S, Maheux R, Berube S and the Canadian Collaborative Group on Endometriosis. Laparoscopic surgery in infertile women with minimal and mild endometriosis . Analysis of sequential treatment protocols for endometriosis-associated infertility . Am J Obstet Gynecol.