What is a normal range for follicle-stimulating hormone (FSH) levels?

The range for follicle-stimulating hormone (FSH) levels is primarily used to evaluate reproductive health, particularly in assessing ovarian function in women and spermatogenesis in men. Option A presents a range of 1.5 IU/L to 17.2 IU/L, which aligns with the normal levels observed in premenopausal women and men.

FSH is critical in the regulation of the reproductive system, and its levels can vary depending on factors such as age, gender, and the specific phase of the menstrual cycle in women. In women, FSH levels tend to be lower during the follicular phase of the menstrual cycle and higher around ovulation, which is why the normal range accounts for fluctuations rather than being a fixed point.

The other options provide ranges that either fall outside the recognized normal levels or use different units that are not standard for measuring FSH. Therefore, identifying option A as the correct choice reflects an understanding of typical FSH levels in the context of human physiology.