Overweight and obese men in a new study showed diminished quantity and quality of semen, suggesting that a weight problem might also affect fertility.This finding is not surprising considering it is well established that obese men tend to be at higher risk of having hypogonadism (condition characterized by low testosterone state). Exercise and weight loss in obese men have been found to improve erectile dysfunction. It remains to be proven whether the same intervention of exercise and weight loss would improve fertility in these men.