Hi Lisa, Hope you are doing ok. I had the injection for 6 months around 15 years ago when the two ablation surgeries I had didn’t work for pain relief for endo. I didn’t get any relief at all from the decapeptyl, but the mirena helped for a few years. The decapeptyl made me go a bit barmy, but I wasn’t given any addback hormone treatment with it. I’d have a look at some of the latest research around GnRH medications – I wouldn’t personally go on it again given the side effects (e.g. bone density loss). Menopause doesn’t have any effect on endometriosis, it might help with adenomyosis, but having a medical menopause stopped after two years to then wait for ‘natural’ menopause to take over sounds a bit strange. If your surgeon isn’t interested in surgery to remove endo, I’d see if you can find another who will, or work out a way to get referred to someone who will excise the endo and look at options for adeno. I have both, am in perimenopause, and am attempting to gather ££ to pay for excision surgery and hysterectomy.