A 28-year-old nulliparous woman attends the infertility clinic with secondary infertility of 18 months. She had one child 4 years ago (vaginal delivery, no complications). Menarche at 12, cycles irregular (35–60 days), heavy periods (flooding, passage of clots). BMI 31 kg/m². Hirsutism present. Pelvic ultrasound shows bilateral polycystic ovaries. Husband's semen analysis is normal. What is the most appropriate next step in management?