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This is a Quantitative Study study.

October 20, 2025Open Access

Rising Temperatures, Spermatogenesis, and Fertility Decline: A 195-Country Analysis of Global and Regional Patterns

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Analysis reveals a strong link between global warming and declining fertility in males, suggesting an urgent public health issue.

Fertility fell sharply from 4.69 to 2.20 births per woman as temperatures rose by 1.19 °C, indicating severe reproductive impacts.
The strong negative correlation between fertility and warming across 195 countries was at r = –0.91, with significant findings in Africa and Asia.
Chronic heat exposure linked to reduced sperm count, quality, and motility underlines the importance of climate-related stressors on reproduction.
Temperature sensitivity of spermatogenesis highlights climate change as a significant risk factor in the multifactorial cause of infertility.

Amini et al. (2025) studied this question.

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October 20, 2025Open Access

View Full Paper

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Authors

Analysis reveals a strong link between global warming and declining fertility in males, suggesting an urgent public health issue.

Fertility fell sharply from 4.69 to 2.20 births per woman as temperatures rose by 1.19 °C, indicating severe reproductive impacts.
The strong negative correlation between fertility and warming across 195 countries was at r = –0.91, with significant findings in Africa and Asia.
Chronic heat exposure linked to reduced sperm count, quality, and motility underlines the importance of climate-related stressors on reproduction.
Temperature sensitivity of spermatogenesis highlights climate change as a significant risk factor in the multifactorial cause of infertility.

Amini et al. (2025) studied this question.

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