The chemicals can be found in items including shoes and furniture.
Sperm quality among men has dropped in recent decades, and scientists believe household chemicals could be partly to blame—and dogs may be suffering from the same problem.
The British authors of the study published in the journal Scientific Reports set out to understand whether these chemicals contributed to the 50 percent reduction in sperm quality among men between 1938 and 2011, and a drop of 30 percent in dogs over a period of 26 years. They took 9 samples of sperm from men and 11 stud dogs who lived in the same area of the U.K. Separate samples of sperm were treated with incrementally increasing doses of the substances.
As the fertility of dogs appears to be comparable to that of humans, this could provide a new approach for researching reproductive health as it is easier to control factors such as diet in animals. "Our previous study in dogs showed that the chemical pollutants found in the sperm of adult dogs, and in some pet foods, had a detrimental effect on sperm function at the concentrations previously found in the male reproductive tract," he said.
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