🔑 POLYCYSTIC OVARIAN SYNDROME (PCOS) Polycystic ovary syndrome (PCOS) is one of the main causes of increased facial hair in women. PCOS is a hormonal disorder affecting the ovaries and is linked with higher level of androgens (the chemical that promotes facial hair growth) Besides facial hair, PCOS often leads to symptoms like irregular periods, weight gain, and acne. It affects up to 10% of women globally and can start as early as puberty.