A team of scientists led by Professor Duanping Liao from Penn State College of Medicine, studied the success rate of conception among women undergoing IVF (In-vitro fertilization ) treatments.
While most air pollution had a widely negative effect on the results, a high presence of nitrogen dioxide showed consistently lower success rates.
Professor Liao, vice chair of the department of public health sciences at Penn State College of Medicine, commented: "Since IVF is a well controlled and highly timed process, we have a much better handle on the assessment of the time of exposures to elevated air pollutants in relationship to fertilization, pregnancy, and delivery."
From these procedures, a total of 13,672 babies were born.
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