You can still get pregnant with one ovary, but only if your healthy enough to.
By having the cyst removed, (even with the ovary), you are taking care of your body so that you can decide whether or not to get pregnant afterward.
I wish you all the best, and will pray for wisdom for you and the doctor working with you.
Morrowville
I would be more worried about having the cyst removed than getting pregnant if I were you. There is a separate forum for women's health and pregnancy issues.