Which of the following is a characteristic feature of Polycystic Ovary Syndrome (PCOS)?

Polycystic Ovary Syndrome (PCOS) is defined by a set of clinical features, and one of the hallmark characteristics is the presence of polycystic ovaries as observed on ultrasound. In women with PCOS, the ovaries typically have multiple cysts (fluid-filled sacs), which contribute to the diagnosis. This ultrasound finding is important as it differentiates PCOS from other conditions that may cause similar symptoms.

The other features associated with PCOS often include irregular menstrual cycles, elevated androgen levels (which may manifest as hirsutism or acne), and issues with ovulation. The combination of these symptoms, along with the ultrasound findings, helps establish the diagnosis of PCOS. Therefore, the presence of polycystic ovaries on an ultrasound is a definitive characteristic of this syndrome.