Most are normal. Making cysts is what the ovary normally does. Ovulation is the process by which an egg is enclosed in a follicle that produces estrogen. The follicle develops over (usually) two weeks, and then ruptures, releasing the egg. This is ovulation. The structure that was the follicle the begins to produce progesterone. It remains present until 10-12 weeks if pregnancy occurs.
Can doctors tell what kind of ovarian cyst you have from only reading an ultrasound? I feel like other tests should be ran.
Usually. Most of the time there are characteristics which strongly favor a benign cyst on us - close followup and time will verify this.