Tuesday June 25, 2019

Sperm Count 50% Lower in Men Whose Fathers Smoke: Study

"Unlike the maternal ovum, the father's gametes divide continuously throughout life and mutations often occur at the precise moment of cell division

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Each sperm has 37.5MB of DNA information in it.
Each sperm has 37.5MB of DNA information in it.

While studies have repeatedly linked maternal smoking during pregnancy with reduced sperm count in male children, a new research showed that men whose fathers smoked at the time of pregnancy also had 50 per cent lower count of sperms than those with non-smoking fathers.

The findings showed that, independently of nicotine exposure from the mother, socioeconomic factors, and their own smoking, men with fathers who smoked had a 41 per cent lower sperm concentration and 51 per cent fewer sperm count than those with non-smoking fathers.

“I was very surprised that regardless of the mother’s level of exposure to nicotine, the sperm count of men whose fathers smoked was so much lower,” said Jonatan Axelsson, specialist physician at Lund University in Sweden. “We know there is a link between sperm count and chances of pregnancy, so that could affect the possibility for these men to have children in future.

“The father’s smoking is also linked to a shorter reproductive lifespan in daughters, so the notion that everything depends on whether the mother smokes or not doesn’t seem convincing,” he added.

However, the research has not determined the underlying mechanisms behind this. But, similar studies have shown links between smoking fathers and various health outcomes in children, such as malformations, Axelsson noted.

Child, baby, father
Sperm count 50% lower in men whose fathers smoke: Study. Pixabay

It could be because most newly occurring mutations (known as de novo mutations) come via the father and there are also links between the father’s age and a number of complex diseases, said researchers in the paper published in the journal PLOS ONE.

In addition, researchers have observed that smoking is linked to DNA damage in sperm and that smokers have more breaks in the DNA strand. Children of fathers who smoke have been reported to have up to four times as many mutations in a certain repetitive part of the DNA as children of non-smoking fathers.

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“Unlike the maternal ovum, the father’s gametes divide continuously throughout life and mutations often occur at the precise moment of cell division.

“We know that tobacco smoke contains many substances that cause mutations so one can imagine that, at the time of conception, the gametes have undergone mutations and thereby pass on genes that result in reduced sperm quality in the male offspring,” Axelsson said. The study was conducted on 104 Swedish men aged between 17 and 20 years.  (IANS)

Next Story

Study Reveals Exposure To E-Cigarette Vape Is Unsafe For Children

Although e-cigarettes, found comparatively safer than cigarettes in terms of harmful substances released, may prove no less harmful when used in the presence of children or inside homes and cars. 

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"Paediatric healthcare providers need to help set the record straight and inform parents that e-cigarette vapour is not safe for children."Pixabay

Believing that exposure to e-cigarette vape is safe for children, parents are increasingly vaping both at home and in car, finds a study.

The study showed only 38 per cent of parents who smoked cigarettes and 22 per cent dual users were found to strictly restrict cigarette use in both home and car.

On the other hand, 56 per cent of both e-cigarette users and dual users reported using e-cigarettes in their cars with children around. The research included 750 parents.

smoking
Although e-cigarettes, found comparatively safer than cigarettes in terms of harmful substances released, may prove no less harmful when used in the presence of children or inside homes and cars. Pixabay

“The finding that a large majority of parents are vaping e-cigarettes inside homes and cars is an alarming trend,” said lead author Jeremy Drehmer at the Massachusetts General Hospital in the US.

“Our results suggest parents perceive it’s safe to use electronic cigarettes and are not taking the same precautions they do to protect their children from exposure to traditional cigarettes,” Drehmer said.

Although e-cigarettes, found comparatively safer than cigarettes in terms of harmful substances released, may prove no less harmful when used in the presence of children or inside homes and cars.

Vaping, teeth,e-cigarette, cigarettes
Nicotine vaping on rise among US teenagers: Survey. Pixabay

Carcinogenetic volatile organic compounds have been detected in the urine of e-cigarette users, and e-cigarettes leave deposits of nicotine on surfaces when used inside, according to the paper published in the Pediatrics journal.

Drehmer said parents have been misled by the marketing of vaping products to believe that the aerosol produced by them is harmless to children.

Also Read: U.S. Keen On Removing All Diplomatic Personnel From Venezuela

The researchers said tobacco majors market e-cigarettes as healthy products without warning about the harms to infants and children from nicotine and ultra-fine toxic particles that spread into the air and coats surfaces.

“Paediatric healthcare providers need to help set the record straight and inform parents that e-cigarette vapour is not safe for children,” Drehmer suggested. (IANS)

 

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