Multiple cysts in the ovaries, often combined with amenorrhoea, virilisation and sterility.
(PCO) The full name (almost never used) is micro-polycystic ovaries: it's a diagnosis best made on transvaginal ultrasound, with lots of medium-sized follicles visible around the rim of the ovaries; can be part of the polycystic ovary syndrome. (The 'cysts' are not real cysts. Think of them as stalled follicles. They don't need to be treated.) A very common condition: about 20% of women have it, though only a few women have the full syndrome.
symptom of PCOS (Polycystic Ovarian Syndrome). A condition whereby the ovaries contain at least ten cysts and are 1.5 to 3 times larger than normal ovaries.