ovarian cysts?

Morgan • •Single mom to two amazing little girls 💞👩‍👧‍👧•
So had my first ultrasound and found a healthy little baby, but he also found 3 huge cysts on my left ovary.. two were about quarter size, and one was half dollar size. And they were all really close together. He said that it wasn't too serious, but that sounds so scary!! How are they caused? Anyone else find out something similar? 😬😬