What Does “Polycystic-Like Appearance of Both Ovaries” Mean?

Polycystic-appearing ovaries refer to a sonographic finding in which the ovaries appear enlarged and contain numerous small, peripheral follicles—typically 2–9 mm in diameter—often arranged in a “string of pearls” pattern. This appearance is commonly observed on transvaginal ultrasound and reflects an increased number of immature antral follicles rather than true cysts. Importantly, polycystic-appearing ovaries are not synonymous with polycystic ovary syndrome (PCOS); they represent a structural observation that may occur in up to 20–30% of reproductive-age women without any clinical features of PCOS, such as oligo- or anovulation, hyperandrogenism, or metabolic dysfunction.

The presence of polycystic-appearing ovaries alone does not warrant a diagnosis of PCOS. According to the Rotterdam criteria—the most widely accepted diagnostic framework—PCOS requires at least two of the following three features: (1) oligo- or anovulation, (2) clinical or biochemical signs of hyperandrogenism, and (3) polycystic ovarian morphology on ultrasound, after excluding other causes such as thyroid dysfunction, hyperprolactinemia, or nonclassical congenital adrenal hyperplasia. Thus, many women with this ultrasound finding have normal menstrual cycles, regular ovulation, and no hormonal abnormalities.

Clinically, polycystic-appearing ovaries may be incidentally identified during pelvic imaging for unrelated indications—such as infertility evaluation, routine gynecologic screening, or assessment of pelvic pain. In the absence of symptoms or endocrine abnormalities, no specific treatment is indicated. However, when associated with PCOS, management focuses on addressing individual concerns: lifestyle modification for weight management and insulin resistance, ovulation induction for fertility, hormonal contraception for cycle regulation and androgen suppression, or anti-androgen therapy for hirsutism or acne.

It is essential for clinicians and patients alike to recognize that ovarian morphology on ultrasound is only one piece of a broader diagnostic puzzle. Overinterpretation of this finding—particularly in asymptomatic individuals—can lead to unnecessary anxiety, labeling, or inappropriate interventions. A comprehensive evaluation, including detailed history, physical examination, and targeted laboratory testing, remains the cornerstone of accurate diagnosis and personalized care.