
What are ovarian cysts?" target="_self" data-before-rewrite-localise="/health/fertility-pregnancy-birth/what-are-ovarian-...
Ovarian cysts are very common in people who menstruate, with an estimated 10% to 30% of women — and potentially more — developing at least one in their lifetime. These fluid-filled sacs develop in or on the ovaries, the small organs located on each side of …