New research has found long-term exposure to air pollution and traffic noise may be associated with higher infertility — but these factors affect men and women differently.
Roughly one in six people are affected by infertility worldwide. And with more than half the world’s population now living in urban areas, researchers are interested in whether living in noisy and polluted cities could be to blame. A new study in Denmark has used nationwide data to explore infertility. It found long-term exposure to air pollution and traffic noise may be associated with higher infertility — but these factors affect men and women differently.
For women, exposure to traffic noise at 10.2 decibels higher than average was associated with 14 per cent increased infertility risk for those over 35. Risks were similar based on residing in urban or rural areas, and when accounting for education and income. The study highlights how environmental exposure can have immediate and long-term effects, and may affect male and female reproduction differently. After puberty, men constantly produce sperm — up to 300 million a day.
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