A nurse is teaching a client with polycystic ovary syndrome (PCOS) who desires pregnancy. Which nursing action best supports fertility outcomes according to current evidence?

Rationale: A. Estrogen-only hormonal therapy is not indicated for fertility in PCOS and can actually suppress ovulation, which is counterproductive for clients desiring pregnancy. B. Encouraging barrier contraception is inappropriate for a client actively trying to conceive. C. Emphasizing dietary modification, weight reduction, and adherence to metformin therapy is supported by evidence as it improves insulin resistance, promotes ovulation, and increases the likelihood of conception in clients with PCOS. D. Restricting all physical exercise is not recommended; moderate physical activity supports weight management, insulin sensitivity, and overall reproductive health.