It is well established that a woman’s fertility declines with age. She is born with a finite supply of eggs, and her estrogen levels diminish as she approaches her menopausal years. The effects of a man’s age, however, on procreation are not as well known. A man produces sperm throughout his life. Though not the norm, many men have fathered children into their fifties and sixties and beyond. John Stamos, George Clooney, and Mick Jagger are a few famous examples. Though age does not have as dramatic an impact on men’s baby-making prowess, some factors could impede a man’s ability...

Women might suspect they have an infertility problem because they have symptoms such irregular or painful periods or a doctor previously diagnosed them with a gynecological condition impacting their fertility. In general, females tend to be more in tune with their bodies as well as visit a doctor more frequently than men do. But perceptive men (and their partners) also can spot problems that may lead to infertility. Here are some of the telltale signs that a man may have trouble conceiving. Libido changes A change in sexual desire, which approximately 15% of men experience, could indicate low testosterone levels....