Seasonal trends in sperm quality in Denmark and Florida.
CohortHuman
This study set out to see if sperm quality changes with the seasons in Denmark and Florida, and whether outdoor temperatures play a role. It looked at semen samples from…
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Heat & Temperature
Peer-reviewed research on testicular temperature, thermal exposure, scrotal cooling, and their observed relationship with male reproductive health.
47Studies
44Human studies
2026Most recent
1Country
Quantifying the exposure-response relationship between temperature exposure and semen quality.
CohortHuman
This study measured how outdoor temperature tracks with semen quality, using records from 5,114 men attending a reproductive medicine centre in Wenzhou, on China's east coast. The measure it used…
Heat exposure during susceptible windows of spermatogenesis and sperm epigenetic age.
CohortHuman
Researchers followed 1,220 men at a Utah fertility clinic and matched the outdoor heat and humidity each man lived through while his sperm were forming against a molecular measure of…
Sauna bathing and mortality risk: unraveling the interaction with systolic blood pressure in a cohort of Finnish men.
CohortHuman
This study followed 2,575 Finnish men aged 42 to 61 for a median of 27.8 years and asked whether sauna habits change how dangerous high blood pressure is. Over that…
Male personal heat exposures and fecundability: A preconception cohort study.
CohortHuman
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…
Longitudinal associations of sauna bathing with inflammation and oxidative stress: the KIHD prospective cohort study.
CohortHuman
This study set out to see if regular sauna use is linked to lower inflammation and oxidative stress over time. It tracked 2269 middle-aged men for 11 years, measuring markers…
Sauna Bathing and Incident Hypertension: A Prospective Cohort Study.
CohortHuman
This study set out to see whether regular sauna use might lower the risk of developing high blood pressure. It tracked 1,621 middle-aged Finnish men without hypertension at the start,…
Sauna bathing reduces the risk of respiratory diseases: a long-term prospective cohort study.
CohortHuman
This study set out to see if regular sauna use might lower the risk of respiratory diseases like chronic obstructive pulmonary disease (COPD), asthma, and pneumonia. It followed 1,935 middle-aged…
Association between sauna bathing and fatal cardiovascular and all-cause mortality events.
CohortHuman
This study set out to see whether how often a man used a sauna tracked with his chance of dying, of heart disease or of anything at all. It followed…
Seminal and molecular evidence that sauna exposure affects human spermatogenesis.
CohortHuman
This study set out to see how regular sauna use affects sperm health in men whose sperm counts were normal to begin with. Ten men used a Finnish sauna twice…
Wet heat exposure: a potentially reversible cause of low semen quality in infertile men.
CohortHuman
This study looked at whether stopping hot tubs, hot baths and whirlpools improves semen quality in infertile men. Eleven men with a regular wet heat habit were assessed before and…
History of febrile illness and variation in semen quality.
CohortHuman
This study looked at what a fever does to semen quality in healthy men. Twenty-seven men with a median age of 24.4 years gave a semen sample every month and…
Diurnal scrotal skin temperature and semen quality. The Danish First Pregnancy Planner Study Team.
CohortHuman
This study asked whether the ordinary, everyday variation in scrotal temperature is enough to matter for sperm. Sixty men from a group of couples planning their first pregnancy wore a…