Peer-reviewed research concerning underwear, summarized and appraised in plain language with every source cited.
This review looked at whether the underwear a man wears, tight versus loose, actually affects his fertility. The testicles work best a little cooler than the rest of the body,…
This study asked whether a man's heat exposures affect how quickly his partner conceives, which is a harder and more useful question than whether they affect a semen sample. It…
This study tested whether a specially designed cooling garment could lower scrotal skin temperature during ordinary daily life. Three volunteer urologists wore it, with a cold pack inside that was…
This study set out to find which stage of sperm production is most sensitive to mild heat. Five healthy volunteers wore a specially designed underwear that held the testicles up…
This study asked what a mild, sustained rise in testicular temperature does to the chromosomes inside sperm. Five fertile volunteers wore specially designed underwear that held the testicles up against…
This review pulled together what is known about how everyday life affects a man's fertility, covering age, psychological stress, nutrition, physical activity, caffeine, scrotal temperature, hot water and mobile phone…
This study looked at whether the type of underwear men wear affects markers of testicular function, such as sperm count and hormone levels. Researchers surveyed 656 men seeking fertility treatment…
This study set out to see how different types of underwear and physical activity affect scrotal temperature, which in turn affects testicular temperature. Fifty healthy men with normal fertility had…
This study set out to find which parts of an ordinary day actually move scrotal temperature. A thermistor (a small temperature sensor) was clipped to the underwear of 101 men…