Prolonged Pregnancy Heat Exposure Linked to Poorer Birth Outcomes in India

The Story in Brief

A nationwide study has linked prolonged exposure to extreme heat during pregnancy with higher risks of low birth weight, preterm birth and stillbirth in India. The paper, ‘Effect of extreme heat stress on adverse pregnancy outcomes in India’, analysed 209,266 births recorded between 2015 and 2020 across 707 districts.

Researchers matched National Family Health Survey data with high-resolution heat estimates, using consecutive sweltering days rather than average temperature. Heat exposure in the first trimester was most associated with preterm birth, exposure in the second with low birth weight, and exposure in the third with stillbirth. Mountainous areas showed stronger associations, while humid subtropical and arid zones also recorded significant links with low birth weight. The study also found higher risks among mothers with low body mass index.

The Indian Opinion

Heat is often treated as a seasonal inconvenience, while this study points to a measurable maternal health risk. But an association in survey and climate data does not prove that heat alone caused each poor outcome. The findings should prompt better heat protection, antenatal advice and local monitoring, especially in vulnerable districts. The useful test is whether future district-level data show fewer preterm births, low-weight babies and stillbirths when protective measures are introduced.

Source: thehindu.com

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