Research has found that common chemicals found in homes affect men’s fertility and that of ‘man’s best friend’…
According to University of Nottingham scientists, chemicals commonly found in our homes and food has the same adverse effects on male fertility in both humans and in domestic dogs.
Declining male fertility
There has been increasing concern over declining human male fertility in recent decades with studies showing a 50% global reduction in sperm quality in the past 80 years.
A previous study by the Nottingham experts showed that sperm quality in domestic dogs has also sharply declined, raising the question of whether modern-day chemicals in the home environment could be at least partly to blame.
Two chemicals studied
The Nottingham team set out to test the effects of two specific human-made chemicals:
- Plasticizer DEHP – widely abundant in carpets, flooring, upholstery, clothes, wires and toys
- Polychlorinated biphenyl 153 – an industrial chemical that, although banned globally, remains widely detectable in the environment, including food.
The researchers carried out identical experiments in both species using samples of sperm from donor men and stud dogs living in the same region of the UK.
The results show that the chemicals, at concentrations relevant to environmental exposure, have the same damaging effect on sperm from both man and dog.
Dogs mirror man
“This new study supports our theory that the domestic dog is indeed a ‘sentinel’ or mirror for human male reproductive decline and our findings suggest that human-made chemicals that have been widely used in the home and working environment may be responsible for the fall in sperm quality reported in both man and dog that share the same environment,” says Richard Lea, research leader, Associate Professor and Reader in Reproductive Biology at the School of Veterinary Medicine and Science.
Their 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.
Source: University of Nottingham via www.sciencedaily.com. Research has found that common chemicals found in homes affect men’s fertility and that of ‘man’s best friend’…
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