Focus Area← All focus areas

Underwear

Peer-reviewed research concerning underwear, summarized and appraised in plain language with every source cited.

9Studies

9Human studies

2026Most recent

1Country

Garment fit, scrotal thermoregulation, and male fertility outcomes: a narrative review.

Translational andrology and urology2026

Narrative ReviewHuman

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,…

View study →

Lifestyle and fertility: the influence of stress and quality of life on male fertility.

Reproductive biology and endocrinology : RB&E2018

Narrative ReviewHuman

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…

Antioxidants Better Fertility Caffeine

View study →