Myths vs facts: Testosteron and Fruchtbarkeit

A common myth is that more testosterone automatically boosts fertility. In reality, the opposite is true: exogenous testosterone (e.g., in hormone replacement therapy) suppresses the body's production of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which severely impairs spermatogenesis. Studies show that men on testosterone therapy often become oligo- or azoospermic. A normal testosterone level is necessary for sperm production, but excess is harmful. Fact: For men with infertility, testosterone should not be used as a 'fertility booster.' Instead, when low testosterone is present and fertility is desired, medications like clomiphene or hCG are used to stimulate endogenous production. Lifestyle factors such as obesity, stress, or poor sleep can lower testosterone and affect fertility – diet and exercise may help, but effects are modest. The evidence is strong: exogenous testosterone is contraceptive, not fertility-enhancing. Safety note: Men wishing to conceive should avoid testosterone preparations and seek medical advice.