Hi Finbarr,
If you still have both ovaries, please don't worry, as mentioned the body is amazing.
History:
I lost my right ovary at 18 due to a dermoid cyst that had twisted/killed the ovary, (yes the pain was horrific), and it was removed through a laparotomy. In the same op another cyst was removed from my left ovary. Unfortunately, in my early 30s, another dermoid cyst was discovered, the surgeon attempted a laparoscopy, but moved to a laparotomy, and again they managed to save the ovary.
Despite thinking this would affect my fertility, I then met my partner and went on to have 3 children naturally. After the birth of my last child, I didn't bounce back as I had with the first two. I put this down to 3 pregnancies but after 18 months the 'bulge'/pain couldn't be ignored and, after a visit to my GP I was rushed through for blood tests, a scan and MRI as cancer was suspected. Instead I had a 12cmx13cmx10cm cystadenoma. I was very scared to operate as I did not want to loose the ovary and go into surgical menopause. Having lost an ovary young, I am already at increased risk of osteoporosis and dementia. Over two years I tried alternative medicine, this helped the pain and softened the cyst, but the impact it was having on my life became unbearable. The advantage of waiting was that the hospital was confident the cyst was benign and they were willing to try and drain it laparoscopically. I finally went into hospital on Thursday and despite the cyst being bigger than anticipated, (my last scan was 18 months ago), and removal complex, the surgeon respected my wishes and managed to save the majority of my ovary.
Unfortunately, no surgeon can tell how comprehensively the cyst is attached to the ovary/tube until they operate but if you have a surgeon that is skilled, and one that you trust, they will do the best they can, especially if you don't have any children yet. I refused to be operated on by two surgeons and I don't regret living longer with the pain to get the optimum outcome.
Good luck and be positive, ask the surgeon every question you need an answer to, and be prepared for the other side - whatever the outcome. If you need any advice with the 'now' or 'after' please ask. It's been a tough few days, the exhaustion and pain is high, but so is the relief that it's out.
Stay strong