right ovarian cyst during 9 week ultrasound?

yesterday we had our first ultrasound! baby looks great per the doctor. he also took images of my ovaries. he said my right is bigger than my left, which isnt unusual but that i also have a small cyst on my right ovary that will probably go away during the course of the pregnancy. he also said i probably ovulated from my right ovary. is this cyst thing normal? i was too busy watching baby's heart beat to even ask