A 28-year-old woman complaining of irregular menstruations and infertility came to the gynecological clinic. Menstruations occur since the age of 15, irregular, with delays up to 2 months. On examination she presents with marked hirsutism and excessive body weight. On vaginal examination the uterus is reduced in size and painless. The ovaries on both sides are dense and enlarged. Ultrasound shows microcystic changes in the ovaries, the ovaries are 5×4 cm and 4.5×4 cm in size with dense ovarian capsule. Basal body temperature is monophasic. What is the most likely diagnosis?