In males, symptoms of decreased testosterone depend upon when the low levels occur. If there is inadequate testosterone in the fetus, genital development may be affected. There may be poor development of the penis and scrotum, with an appearance of female genitalia or ambiguous genitalia that are neither male nor female. Remember that the definition of male is based upon the type of chromosomes present and not necessarily upon the outward appearance. If low testosterone occurs before or during puberty, there may be a lack of sexual maturation. Signs may include failure to develop muscle mass, failure of the voice to deepen, poor growth of body hair, enlarged breasts (gynecomastia), and failure of the penis and testes to enlarge. In adulthood,...
