Thank you for your query.
In essence your ultrasound
is normal, this cyst
that is seen on your ovary might just be part of the normal ovulatory cycle. If the cyst grows bigger and more develop it is known as poly cystic ovarian syndrome , caused by an abnormal hormonal
cycle. Depending on wether you are trying to fall pregnant right now or not your abnormal cycle can be treated in various ways. Discuss this with your Gynecologist. I trust this information puts your mind at ease.