Hi and welcome to the forum! I am glad that I can help you.
You would like to know whether there could be any changes in a period if a female individual has only one ovary.
Female individuals may experience removal of one ovary due to cysts, benign or malignant tumors, or torsion. Usually they don't experience changes in the period after the surgery. The other ovary will produce the normal level of estrogen and progesterone. Women can still become pregnant in case they have only one ovary.
Given the data that you described, you fear that you might have to have one of your ovaries removed. The surgery won't affect the period. However, if the remaining ovary produces low hormone levels, then you may experience irregular cycles.
Please keep in mind that I provide medical information only. I am not able to diagnose medical conditions online. Please contact your doctor or other qualified healthcare provider such as a gynecologist for further advice and information about the connection between removal of one ovary and menstrual cycles.
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