
When an otherwise healthy young woman has irregular or infrequent periods, she likely has a hormone imbalance. One of the most common hormonal abnormalities is Polycystic Ovary Syndrome (PCOS).
About 10% of women of childbearing age are diagnosed with PCOS. In addition to irregular menstrual cycles, the condition is characterized by elevated levels of insulin and male hormone (androgen), which may cause acne or excess facial and body hair. But most women with PCOS can still get pregnant with proper treatment.