1.   The researchers found that when male monkeys compete, their testosterone levels rise.

2.   Testosterone levels in male fans rise markedly after a victory but drop just as sharply after a defeat.

3.   And any user risks male pattern baldness, a problem that normal testosterone levels can trigger in men.

4.   Androderm was approved to treat men who are hypogonadal, which means men who have unusually low testosterone levels for their age.

5.   As its first project, the company is developing a drug to reduce testosterone levels in men with prostate cancer.

6.   Ballesteros can be calculatingly antagonistic, and that has been especially true in this event when the testosterone levels reach a particularly high level.

7.   Both types of castration lower testosterone levels in the blood, reducing sex drive.

8.   A study in Georgia has shown, for instance, that testosterone levels in male fans rise markedly after a victory and drop just as sharply after a defeat.

9.   Add the Super Bowl element, and the testosterone level may shoot off the charts.

10.   Aldactone, a diuretic used to treat high blood pressure, can reduce testosterone levels.