All military service members over 30 years of age are required to take testosterone level tests, according to U.S. War/Defense Secretary Pete Hegseth. It's unclear whether females will be tested for it as well. Those who are diagnosed with low testosterone levels can receive treatments to improve their ability to be battle-ready. It's a bit peculiar though seeing that China, for instance, is developing robots for military use, that there should be this much focus on our human soldiers.