How to know if a ovarian cyst ruptures?

Ultrasound: An ovarian cyst is a fluid collection that develops in an ovarian follicle. When a cyst breaks open, the fluid goes into the abdomen where it is absorbed. You can sometimes have some discomfort if the cyst fluid is irritating to your internal organs. Your ovary is very good at healing itself and there usually are no long-term problems. An u/s can be used to verify the cyst is gone.