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?

Explanation

## Clinical Diagnosis This patient has clinical and ultrasound features of **polycystic ovary syndrome (PCOS)**: - Irregular cycles (35–60 days) - Hirsutism (androgen excess) - Elevated BMI (31 kg/m²) - Bilateral polycystic ovaries on ultrasound - Anovulation (secondary infertility) ## Why Metabolic Workup + Medical Management? **Key Point:** PCOS is a metabolic and endocrine disorder, not purely a structural problem. First-line management includes metabolic assessment and insulin-sensitizing agents before pursuing invasive procedures. **High-Yield:** The Rotterdam criteria for PCOS diagnosis require 2 of 3: (1) irregular/anovulatory cycles, (2) clinical or biochemical hyperandrogenism, (3) polycystic ovaries on imaging. This patient meets all three. **Mnemonic: PCOS First-Line Management = MIC** - **M**etformin (insulin sensitizer) - **I**nsulin resistance assessment (fasting glucose, insulin, HOMA-IR) - **C**lomiphene citrate (ovulation induction) **Clinical Pearl:** Metformin improves insulin sensitivity, reduces androgen levels, and restores ovulation in 30–40% of PCOS patients. It should be started before or concurrent with clomiphene. Fasting glucose and insulin are needed to assess insulin resistance and guide metformin dosing. ## Why Not the Other Options? | Option | Why Not Appropriate | |--------|---------------------| | **Laparoscopic ovarian drilling (Option 0)** | Reserved for clomiphene-resistant PCOS after medical management fails. Not first-line; invasive. | | **HSG (Option 1)** | Tubal assessment is appropriate *after* restoring ovulation. Premature before addressing anovulation. | | **IUI with gonadotropins (Option 3)** | Expensive, invasive, and not first-line. Reserved for failed clomiphene/metformin therapy or male factor. | ## PCOS Management Pathway ```mermaid flowchart TD A[PCOS diagnosed:<br/>irregular cycles, hirsutism,<br/>polycystic ovaries]:::outcome --> B[Assess metabolic status:<br/>fasting glucose, insulin,<br/>testosterone, HOMA-IR]:::action B --> C[Start metformin +<br/>lifestyle modification]:::action C --> D[Add clomiphene citrate<br/>50–100 mg day 2–6]:::action D --> E{Ovulation restored?}:::decision E -->|Yes| F[Proceed to HSG if<br/>tubal status unknown]:::action E -->|No| G[Increase clomiphene or<br/>add gonadotropins]:::action G --> H{Still resistant?}:::decision H -->|Yes| I[Consider laparoscopic<br/>ovarian drilling]:::action ``` [cite:Textbook of Obstetrics and Gynaecology by D.C. Dutta, 8e Ch 16; ASRM Guidelines on PCOS and Infertility]