Signs and symptoms of low levels of testosterone in men are often due to normal aging, but also can occur during the fetal development stage, puberty, or even during adulthood. • Fetal Development If hypogonadism begins during the fetal development stage, the result is impaired growth to the external sex organs. This is dependent on when hypogonadism begins and the level of testosterone that is present during the fetal development stage, then a male may develop: • Female genitals • Ambiguous genitals, which are not defined as clearly male or female • Underdeveloped male genitals • Puberty Even during your normal growth period, it can become jeopardized if hypogonadism happens, problems can occur with: • Muscle development • Deepening of the male voice • Lack of body hair • Underdeveloped genitals • Long and lanky limbs • Enlarged chest (breast) area • Adulthood Finally, the last area of life that hypogonadism can occur is in adulthood, insufficient levels of testosterone can lead to many other issues, the symptoms that would be showcased include: • Low energy • Low muscle mass • Infertility • Erectile dysfunction • Decreased sex drive • Hair growth is slow • Hair loss • Loss of bone mass • Gynecomastia • Fatigue • Mental fogginess