Population and Environment· 2026Q1
The effect of temperature on fertility: a province-level analysis of monthly total fertility rates in Italy in 2003–2022
- 2citations
- Q1SCImago
- 2026year
Short summary
Exposure to hot days (mean temperature > 25°C) reduces Italy's total fertility rate by 9 months, with a larger impact in wealthier provinces and those with less healthcare staff.
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Key points
- Hot days (mean temperature > 25°C) are linked to a decrease in total fertility rates.
- The impact on fertility is observed approximately nine months after exposure to hot days.
- Wealthier provinces (above-average GDP) experienced a larger negative effect of heat on fertility.
- Provinces with lower healthcare workforce availability also showed a greater impact of heat on fertility.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Long-term climate change has increased the frequency and intensity of high-temperature weather events, which in turn affect human health and wellbeing. Warmer temperatures are reported to affect both reproductive health and behaviors, possibly reducing birth rates. In a low-fertility context, the potential negative impact that climate change might have on fertility is consequential. This study focuses on Italy, a low-fertility country disproportionately affected by climate change, with sharp regional disparities in both climate zones and economic development. Matching monthly birth registration data for the period 2003 to 2022 with E-OBS, ERA-5 and CAMS meteorological data, we analyze the relationship between heat exposure and total fertility rates in 107 Italian provinces (corresponding to the NUTS-3 classification). Results show that exposure to hot days, which are defined as days with a mean temperature above 25 °C, has a relatively immediate impact on conception probabilities as it reduces the total fertility rate nine months later. Additional analyses revealed that the largest effect of heat on fertility occurs in above-average GDP provinces and provinces with lower-than-average healthcare workforce availability.
The authors' abstract, as published at the source. Population and Environment, 2026 · DOI ↗
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