ArticleAndrology2022
Male personal heat exposures and fecundability: A preconception cohort study.
Article in Andrology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
8 citing papers in PubMed.
- Associations of Lifestyle Factors with Cadmium and Nickel in Seminal Fluid of Potential Sperm Donors.Biological trace element research · 2026Article
- Integrating Sperm Microscopy, Environmental Exposures, and Lifestyle Factors for Male Fertility Analysis: Protocol for the Nippon Semen and Environmental Exposure Database (N-SEED) Cross-Sectional Study.JMIR research protocols · 2026Article
- Global Warming, Fertility, and Spermatogenesis Decline: Global and Regional Evidence from 195 Countries and Implications for Climate Adaptation Policy.International journal of environmental research and public health · 2026Article
- Testicular ergonomics: whole-body vibration, mechanotransduction, and male reproductive health in heavy machinery operators.Frontiers in public health · 2026Review
- The impact of chemical pollution and warming on male fertility: a narrative review by the Special Interest Group "Environment and Fertility" of the Italian Society of Fertility and Sterility and Reproductive Medicine (SIFES-MR).Journal of assisted reproduction and genetics · 2025Review
- Sauna therapy in rheumatic diseases: mechanisms, potential benefits, and cautions.Rheumatology international · 2025Review
- A prospective study of male physical activity and fecundability.Human reproduction (Oxford, England) · 2025Article
- [Impact of lifestyle and environmental factors on male reproductive health].Urologie (Heidelberg, Germany) · 2022Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors.
Funding
Abstract
backgroundSeveral studies indicate adverse effects of selected heat exposures on semen quality, but few studies have directly evaluated fertility as an endpoint.
objectiveWe evaluated prospectively the association between male heat exposures and fecundability, the per-cycle probability of conception. MATERIALS AND
methodsWe analyzed data from 3041 couples residing in the United States or Canada who enrolled in a prospective preconception cohort study (2013-2021). At enrollment, males reported on several heat-related exposures, such as use of saunas, hot baths, seat heaters, and tight-fitting underwear. Pregnancy status was updated on female follow-up questionnaires every 8 weeks until conception or a censoring event (initiation of fertility treatment, cessation of pregnancy attempts, withdrawal, loss to follow-up, or 12 cycles), whichever came first. We used proportional probabilities regression models to estimate fecundability ratios (FR) and 95% confidence intervals (CIs) for the association between heat exposures and fecundability, mutually adjusting for heat exposures and other potential confounders.
resultsWe observed small inverse associations for hot bath/tub use (≥3 vs. 0 times/month: FR = 0.87, 95% CI: 0.70-1.07) and fever in the 3 months before baseline (FR = 0.94, 95% CI: 0.79-1.12; one cycle of follow-up: FR = 0.84, 95% CI: 0.64-1.11). Little association was found for sauna use, hours of laptop use on one's lap, seat heater use, time spent sitting, and use of tight-fitting underwear. Based on a cumulative heat metric, FRs for 1, 2, 3, and ≥4 versus 0 heat exposures were 0.99 (95% CI: 0.87-1.12), 1.03 (95% CI: 0.89-1.19), 0.94 (95% CI: 0.74-1.19), and 0.77 (95% CI: 0.50-1.17), respectively. Associations were stronger among men aged ≥30 years (≥4 vs. 0 heat exposures: FR = 0.60, 95% CI: 0.34-1.04).
conclusionMale use of hot tubs/baths and fever showed weak inverse associations with fecundability. Cumulative exposure to multiple heat sources was associated with a moderate reduction in fecundability, particularly among males aged ≥30 years.
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