Clinical Features and Diagnosis of Polycystic Ovary Syndrome (PCOS)

Introduction to PCOS

The American College of Cardiology notes that PCOS presents with a triad of core clinical features: menstrual irregularities, hyperandrogenic manifestations, and metabolic disturbances, with at least two of these domains required for diagnosis 1, 2

Menstrual irregularities are a hallmark feature of PCOS, manifesting as oligomenorrhea or amenorrhea due to chronic anovulation, as reported by the American College of Cardiology 1

Hirsutism occurs in approximately 75% of PCOS cases and represents the most visible androgenic symptom, according to Praxis Medical Insights 2
The hormonal cascade involves accelerated GnRH pulsatility driving excessive LH secretion, which stimulates ovarian theca cells to overproduce testosterone, as described by Praxis Medical Insights 2
Hyperinsulinemia directly amplifies androgen production and suppresses sex hormone-binding globulin (SHBG), increasing free testosterone levels, as noted by Praxis Medical Insights 2

Insulin resistance and hyperinsulinemia are present in the majority of PCOS patients, independent of obesity status, as reported by the American College of Cardiology and Praxis Medical Insights 1, 2
Abdominal obesity and weight gain are major triggers for PCOS development and symptom worsening in genetically susceptible women, according to the American College of Cardiology and Praxis Medical Insights 1, 2
Central obesity exacerbates metabolic, reproductive, and psychological features, and obesity prevalence in PCOS has increased from 51% in the 1990s to 74% in recent decades, as noted by Praxis Medical Insights 3
Metabolic syndrome features include abdominal obesity, type 2 diabetes, dyslipidemia, and hypertension, which contribute to endothelial dysfunction and subclinical atherosclerosis, as reported by the American College of Cardiology 1
Women with PCOS face increased cardiovascular disease risk throughout their lifespan, according to the American College of Cardiology 1
Glucose intolerance and type 2 diabetes develop at higher rates due to insulin resistance, as reported by the American College of Cardiology and Praxis Medical Insights 1, 3

Anxiety, depression, and eating disorders are prevalent in PCOS and significantly impact quality of life, as noted by the American College of Cardiology 1

Cardiovascular disease risk is elevated, with PCOS considered a risk-enhancing factor requiring screening for weight changes every 6-12 months, annual blood pressure checks, fasting lipid panels, and glycemic control assessments, as recommended by the American College of Cardiology 1

Certain medications, particularly valproate, can exacerbate PCOS or trigger PCOS-like symptoms including worsening hirsutism, as noted by Praxis Medical Insights 2
Ethnic variation exists, with East Asian women showing highest metabolic syndrome prevalence despite lower BMI and less hyperandrogenic features, as reported by the American College of Cardiology 1