A 32-year-old woman from Mumbai with a 6-year history of PCOD (diagnosed on ultrasound and elevated LH:FSH ratio) presents with primary infertility for 2 years. She has a BMI of 28 kg/m², regular cycles on combined OCP, and wishes to conceive. Her partner's semen analysis is normal. Baseline FSH is 6.5 mIU/mL, LH is 12 mIU/mL, and fasting insulin is 18 µU/mL (elevated). Transvaginal ultrasound shows multiple small follicles bilaterally. What is the most appropriate next step in her management?