Scientists claim that sperm quality among human males and even dogs has dropped significantly over the years. Some theories claim that everyday household chemicals might be one of the most significant contributors to the issue. A group of scholars studied the potential effects of a chemical used to make plastic: DEHP. The substance can be found in items like carpets, flooring, furniture, toys, upholstery, and shoes. They also tested a banned chemical called the polychlorinated biphenyl 153, as it has also been linked to infertility in men.
The study’s authors found out that there was a 50% decrease in sperm quality among human males and 30% drops in dogs from 1938 to 2011. They took nine samples of sperms in human males as well as eleven dogs who lived in the same area. The vitro tests suggested that these chemicals affected how sperms move from different points. It also caused the cells to develop abnormalities due to DNA fragmentation. The results concluded that dogs can serve as “mirrors” to the reproductive health of men. Since male fertility among dogs is quite comparable to its human counterparts, it opened up a possibility of a new approach when it comes to reproductive health research.
Professor in reproductive biology at the University of Nottingham School of Veterinary Medicine and Science and lead author of the study, Richard Lea, said that their findings strongly suggest that human-made substances widely used in our everyday lives can be responsible for the sperm quality issues in both dogs and men who share the same environment. A professor of comparative veterinary reproduction and dean of the School of Veterinary Medicine and Science, Gary England said that in future studies, it is essential to determine how the areas in which we inhabit can affect sperm quality between both dogs and men.