Q. A 27-year-old woman presents to the primary care clinic complaining of irregular menstrual cycles. She reports that her periods last between 5–7 days but occur infrequently, approximately every 70 – 90 days. She has been experiencing this pattern for the last two years and is concerned about her fertility as she plans to conceive in the near future. She denies using any form of contraception. Her past medical history is unremarkable, and she is not on any medications. On physical examination, it has been noticed that she has cystic acne on her face and hirsutism. Her body mass index is 29 kg/m2. Her vital signs are within normal limits.Rest of her systemic examination is unremarkable. What is the most appropriate next step to diagnose this patient’s condition?