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Household Contaminants May Cause Infertility in Men, Dogs

The researchers carried out identical experiments for both species using samples of sperm from donor men and stud dogs, living in the same region

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The results showed that the pups' attractiveness was lowest at birth and increased to a maximum before 10 weeks of age before declining and then levelling off.
Representational Image. pixabay

Environmental contaminants found in home and diet have the same adverse effects on male fertility both in humans and domestic dogs, finds a new study highlighting the decline in sperm quality in both the species over the past few years.

The findings, published in the journal Scientific Reports, showed the chemicals — at concentrations relevant to environmental exposure — have the same damaging effect on sperm of both man and dog.

“We know when human sperm motility is poor, DNA fragmentation is increased and that human male infertility is linked to increased levels of DNA damage in sperm,” said co-author Rebecca Sumner, postdoctoral student at the University of Nottingham, Britain.

“We now believe this is the same in pet dogs because they live in the same domestic environment and are exposed to the same household contaminants,” Sumner said.

Family walk with dog. Pixabay

For the study, the team tested the effects of two man-made chemicals — the common plasticiser DEHP, widely used in the home (e.g. carpets, clothes, toys) and the industrial chemical polychlorinated biphenyl 153, which although banned globally, remains widely detectable in the environment, including food.

The researchers carried out identical experiments for both species using samples of sperm from donor men and stud dogs, living in the same region.

Also Read- Now The Delhi Government Comes Up With The Food Wastage Check Policy At Social Gatherings

“This new study supports our theory that the domestic dog is indeed a ‘sentinel’ or mirror for human male reproductive decline. Our findings suggest man-made chemicals, widely used in home and working environment, may be responsible for the decline in sperm quality,” lead author Richard Lea from the varsity noted. (IANS)

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High Levels of Testosterone May Raise Heart Failure Risk in Men

For the study, researchers included almost four lakh men and women aged 40 to 75 years

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Heart rate
Heart rate, Flickr
Men with genetic predisposition to high testosterone levels could be at increased risk of developing blood clots and heart failure, a study has found.
The study, led by City University of New York researchers, aimed to determine whether endogenous testosterone has a causal role in blood clots (thromboembolism), heart failure and heart attack (myocardial infarction).
They found endogenous testosterone was positively associated with thromboembolism, heart failure, and myocardial infarction in men.
The findings, published by The BMJ, can also have implications for men who take testosterone supplements to boost energy levels and sex drive, said Mary Schooling, Professor at the varsity.
Endogenous testosterone can be controlled with existing treatments and could be a modifiable risk factor for thromboembolism and heart failure, she noted.
Heart Attack, women
Anti-inflammatory drugs may put you at heart attack risk.
Pixabay
“We need to be thinking of new directions for reducing heart disease and this is one way of doing it,” Schooling was quoted as saying to The Guardian.
She pointed out that statins, which are used to reduce the risk of heart attack and stroke, have been found to lower testosterone levels.
“To protect men we should be looking at treatments and lifestyles which are more on the side of keeping testosterone lower rather than higher,” she said.
For the study, researchers included almost four lakh men and women aged 40 to 75 years.
The associations were found less obvious in women. (IANS)