რუბრიკა „გალილეო“ გაგაცნობთ კვლევებს, რომელთაც მამაკაცთა ნაყოფიერებაზე სხვადასხვა ფაქტორის უარყოფითი გავლენა შეისწავლესაუდიო ვერსიის ჩამოტვირთვა
ჩამოტვირთვა
მამაკაცები, რომლებიც მობილურ ტელეფონს შარვლის ჯიბით ატარებენ, უნებლიედ შესაძლოა საკუთარ ნაყოფიერებას აზიანებდნენ და შთამომავლობის გაგრძელების უნარს ზღუდავდნენ. მიზეზი ის არის, რომ წინასწარი შედეგებით, ტელეფონის ელეტრომაგნიტური რადიაცია მათი მამობის შანსს ამცირებს. მეცნიერები ამ გარემოებას მნიშვნელოვან ფაქტორად მიიჩნევენ, რადგან დედამიწაზე ზრდასრული ადამიანების უმეტესობა მობილურ ტელეფონს ხმარობს. მაღალ და საშუალოშემოსავლიან ქვეყნებში კი მოსახლეობის 14 პროცენტს უშვილობის პრობლემა აქვს.
დიდი ბრიტანეთის ექსეტერის უნივერსიტეტში პროფესორ ფიონა მათეუსის ხელმძღვანლეობით 10 სხვადასხვა სამეცნიერო კვლევა შეაჯამეს, რომლებიც დაკვირვებას 1 492 ადამიანზე აწარმოებდა. კვლევების მიხედვით, მობილური ტელეფონების გავლენით სპერმების მოძრაობა 8 პროცენტით შენელდა. ამავე რაოდენობით შემცირდა მათი სიცოცხლისუნარიანობაც. პროფესორ მათეუსის თქმით, ეფექტი განსაკუთრებით კრიტიკულია იმ მამაკაცებში, ვინც განაყოფიერების პრობლემების ზღვარზე ისედაც იმყოფებოდა.
მეცნიერების აზრით, შესაძლოა პრობლემა არამარტო მობილურ ტელეფონებში, არამედ ზოგადად გარემოს სხვა ფაქტორების, მაგალითად -თანამედროვე ტექნოლოგიების სხვა უსადენო გადამცემებშიც- აღმოჩნდეს და ამ შემთხვევაში საქმე ერთგვარ კრებით ფაქტორთან გვექნება. საბოლოო დასკვნების გასაკეთებლად კი, პროფესორ მათეუსის განცხადებით, „შემდეგი კვლევებია საჭირო, რათა მოსახლეობაზე მობილური ტელეფონის გავლენის სრული კლინიკური ზემოქმედება გაირკვეს“. კვლევის შედეგების დეტალური გაცნობა შესაძლებელია ჟურნალის „საერთაშორისო გარემოს დაცვა“ (Environment International) 9 ივნისის გამოქვეყნებაში.
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დღეს კიდევ ერთ უახლეს კვლევას გაგაცნობთ, რომელიც ადასტურებს, რომ მარიხუანის მოწევა, როგორც დამოუკიდებელი ფაქტორი, ასევე უარყოფით გავლენას ახდენს მამაკაცთა ნაყოფიერებაზე. კერძოდ, ის ახალგაზრდა მამაკაცის სპერმის ზომაზე და ფორმაზე ზემოქმედებს, რითაც უშვილობის პრობლემებს იწვევს, ნათქვამია შეფილდის და მანჩესტერის უნივერსიტეტების მიერ ჩატარებული კვლევის დასკვნაში.
სამეცნიერო ექსპერიმენტში 14 უნაყოფობის ცენტრიდან 2 249 მამაკაცი მონაწილეობდა. როგორც მეცნიერები იუწყებიან, 30 წლამდე ასაკის ახალგაზრდებში, ვინც მარიხუანა ანალიზის აღებამდე 3 თვის განმავლობაში მოწია, ნორმალური სპერმის არსებობის შანსი 2-ჯერ მცირდება იმათთან შედარებით, ვისაც ბოლო 3 თვის მანძილზე ის რაიმე ფორმით არ მიუღია. მრავალი კვლევით არაერთხელ დადასტურდა, რომ სპერმის ხარისხს, კონცენტრაციას, ფორმას და ზომას მამაკაცის ჯანმრთელი განაყოფიერების უნარში გადამწყვეტი მნიშვნელობა ენიჭება.
მეცნიერები ურჩევენ იმ მამაკაცებს, ვისაც შვილის ყოლა სურს, დაუყოვნებლივ შეწყვიტონ მარიხუანის, თუ სხვა სახის ნარკოტიკული ნივთიერების მიღება. „ჩვენი მონაცემებიდან გამომდინარე მარიხუანას მწეველებს შეგვიძლია ვურჩიოთ, რომ შეწყვიტონ მისი ნებისმიერი სახით მიღება, თუკი მათ ოჯახის დაწყება და შვილის ყოლა სურთ“ - აღნიშნავს ალან პეისი, კვლევის ავტორი და შეფილდის უნივერსიტეტის უფროსი მეცნიერ-თანამშრომელი. კვლევა გამოქვეყნდა 4 ივნისს ოქსფორდის სამედიცინო გამოცემაში „ადამიანის რეპროდუქცია“ (Human Reproduction)წყარო: ამერიკის ხმა
Cell phones negatively affect male fertility, new study suggests
Date:
June 9, 2014
Source:
University of Exeter
Summary:
Men who keep a cell phone in their pant pocket could be inadvertently damaging their chances of becoming a father, according to a new study. Previous research has suggested that radio-frequency electromagnetic radiation (RF-EMR) emitted by the devices can have a detrimental effect on male fertility. Most of the global adult population own mobile phones, and around 14% of couples in high and middle income countries have difficulty conceiving.
en who keep a mobile phone in their trouser pocket could be inadvertently damaging their chances of becoming a father, according to a new study led by the University of Exeter.
Previous research has suggested that Radio-frequency electromagnetic radiation (RF-EMR) emitted by the devices can have a detrimental effect on male fertility. Most of the global adult population own mobile phones, and around 14% of couples in high and middle income countries have difficulty conceiving.
A team led by Dr Fiona Mathews, of Biosciences at the University of Exeter, conducted a systematic review of the findings from ten studies, including 1,492 samples, with the aim of clarifying the potential role of this environmental exposure.
Participants in the studies were from fertility clinics and research centres, and sperm quality was measured in three different ways: motility (the ability of sperm to move properly towards an egg), viability (the proportion of sperm that were alive) and concentration (the number of sperm per unit of semen).
In control groups, 50-85% of sperm have normal movement. The researchers found this proportion fell by an average of 8 percentage points when there was exposure to mobile phones. Similar effects were seen for sperm viability. The effects on sperm concentration were less clear.
Dr Mathews said: "Given the enormous scale of mobile phone use around the world, the potential role of this environmental exposure needs to be clarified. This study strongly suggests that being exposed to radio-frequency electromagnetic radiation from carrying mobiles in trouser pockets negatively affects sperm quality. This could be particularly important for men already on the borderline of infertility, and further research is required to determine the full clinical implications for the general population."
The results were consistent across in vitro studies conducted under controlled conditions and observational in vivo studies conducted on men in the general population.
"Effect of mobile telephones on sperm quality: a systematic review and meta-analysis" by Fiona Mathews et al is published today in the journal Environment International.
Story Source:
The above story is based on materials provided by University of Exeter. Note: Materials may be edited for content and length.
Men who keep a cell phone in their pant pocket could be inadvertently damaging their chances of becoming a father, according to a new study. Previous research has suggested that radio-frequency electromagnetic radiation (RF-EMR) emitted by the devices can have a detrimental effect on male fertility. Most of the global adult population own mobile phones, and around 14% of couples in high and middle income countries have difficulty conceiving.
en who keep a mobile phone in their trouser pocket could be inadvertently damaging their chances of becoming a father, according to a new study led by the University of Exeter.
en who keep a mobile phone in their trouser pocket could be inadvertently damaging their chances of becoming a father, according to a new study led by the University of Exeter.
Previous research has suggested that Radio-frequency electromagnetic radiation (RF-EMR) emitted by the devices can have a detrimental effect on male fertility. Most of the global adult population own mobile phones, and around 14% of couples in high and middle income countries have difficulty conceiving.
A team led by Dr Fiona Mathews, of Biosciences at the University of Exeter, conducted a systematic review of the findings from ten studies, including 1,492 samples, with the aim of clarifying the potential role of this environmental exposure.
Participants in the studies were from fertility clinics and research centres, and sperm quality was measured in three different ways: motility (the ability of sperm to move properly towards an egg), viability (the proportion of sperm that were alive) and concentration (the number of sperm per unit of semen).
In control groups, 50-85% of sperm have normal movement. The researchers found this proportion fell by an average of 8 percentage points when there was exposure to mobile phones. Similar effects were seen for sperm viability. The effects on sperm concentration were less clear.
Dr Mathews said: "Given the enormous scale of mobile phone use around the world, the potential role of this environmental exposure needs to be clarified. This study strongly suggests that being exposed to radio-frequency electromagnetic radiation from carrying mobiles in trouser pockets negatively affects sperm quality. This could be particularly important for men already on the borderline of infertility, and further research is required to determine the full clinical implications for the general population."
The results were consistent across in vitro studies conducted under controlled conditions and observational in vivo studies conducted on men in the general population.
"Effect of mobile telephones on sperm quality: a systematic review and meta-analysis" by Fiona Mathews et al is published today in the journal Environment International.
Story Source:
The above story is based on materials provided by University of Exeter. Note: Materials may be edited for content and length.
Smoking cannabis can change the size and shape of sperm for over three months, researchers warn
Men who use cannabis may be putting their fertility at risk, scientists have warned.
They say that anyone trying to start a family should stay away from the drug.
They also revealed that sperm quality was lower in the summer, but was better in men who had abstained from sexual activity for more than six days.
The world¿s largest study to investigate how common lifestyle factors influence the size and shape of sperm found other common lifestyle factors reported by men, including smoking cigarettes or drinking alcohol, appeared to have little effect - but smoking cannabis did.
In the world’s largest study to investigate how common lifestyle factors influence the size and shape of sperm, a research team from the Universities of Sheffield and Manchester foundother common lifestyle factors reported by men, including smoking cigarettes or drinking alcohol, appeared to have little effect.
The study, published in the medical journal Human Reproduction, recruited 2,249 men from 14 fertility clinics around the UK, and asked them to fill out detailed questionnaires about their medical history and their lifestyle.
They found men who produced ejaculates with less than four percent normal sperm were nearly twice as likely to have produced a sample in the summer months (June to August), or if they were younger than 30 years old, to have used cannabis in the three month period prior to ejaculation.
Lead author Dr Allan Pacey, Senior Lecturer in Andrology at the University of Sheffield, said: 'Our knowledge of factors that influence sperm size and shape is very limited, yet faced with a diagnosis of poor sperm morphology, many men are concerned to try and identify any factors in their lifestyle that could be causing this.
'It is therefore reassuring to find that there are very few identifiable risks, although our data suggests that cannabis users might be advised to stop using the drug if they are planning to try and start a family.'
Previous research has suggested that only sperm with good sperm morphology are able to pass into the woman’s body following sex and make their way to the egg and fertilise it.
Men who produced ejaculates with less than four percent normal sperm were nearly twice as likely to have produced a sample in the summer months (June to August), or if they were younger than 30 years old, to have used cannabis in the three month period prior to ejaculation.
Studies in the laboratory also suggest that sperm with poor morphology also swim less well because their abnormal shape makes them less efficient.
Dr Andrew Povey, from the University of Manchester’s Institute of Population Health, said: 'This research builds on our study of two years ago which looked at the risk factors associated with the number of swimming sperm (motile concentration) in men’s ejaculates.
'This previous study also found that there were relatively few risk factors that men could change in order to improve their fertility.
'We therefore have to conclude again that there is little evidence that delaying fertility treatment to make adjustments to a man’s lifestyle will improve their chances of a conception.'
Although the study failed to find any association between sperm morphology and other common lifestyle factors, such as cigarette smoking or alcohol consumption, it remains possible that they could correlate with other aspects of sperm that were not measured, such as the quality of the DNA contained in the sperm head.
Professor Nicola Cherry, originally from the University of Manchester but now at the University of Alberta, commented on a recent companion paper published by the group in the Journal of Occupational and Environmental Medicine: 'In addition to cannabis exposure shown in this paper, we also know that men exposed to paint strippers and lead are also at risk of having sperm with poor morphology.'
The world¿s largest study to investigate how common lifestyle factors influence the size and shape of sperm found other common lifestyle factors reported by men, including smoking cigarettes or drinking alcohol, appeared to have little effect - but smoking cannabis did.
Men who produced ejaculates with less than four percent normal sperm were nearly twice as likely to have produced a sample in the summer months (June to August), or if they were younger than 30 years old, to have used cannabis in the three month period prior to ejaculation.
რესურსები ინტერნეტში:
1) Mobile phone effect on fertility - 'research needed'
2) Cell phones negatively affect male fertility, new study suggests
3) Cell Phone Exposure can Lead to Infertility in Men, Study
4) Mobile phones negatively affect male fertility, new study suggests
5) Smoking cannabis can change the size and shape of sperm for over three months, researchers warn
6) Marijuana Damages Sperm?
7) Marijuana smoking damages sperm
8) Pot Use Might Be Linked to Abnormal Sperm
9) Marijuana use may affect the size and shape of men's sperm
რესურსები ინტერნეტში:
1) Mobile phone effect on fertility - 'research needed'
2) Cell phones negatively affect male fertility, new study suggests
3) Cell Phone Exposure can Lead to Infertility in Men, Study
4) Mobile phones negatively affect male fertility, new study suggests
5) Smoking cannabis can change the size and shape of sperm for over three months, researchers warn
6) Marijuana Damages Sperm?
7) Marijuana smoking damages sperm
8) Pot Use Might Be Linked to Abnormal Sperm
9) Marijuana use may affect the size and shape of men's sperm
1) Mobile phone effect on fertility - 'research needed'
2) Cell phones negatively affect male fertility, new study suggests
3) Cell Phone Exposure can Lead to Infertility in Men, Study
4) Mobile phones negatively affect male fertility, new study suggests
5) Smoking cannabis can change the size and shape of sperm for over three months, researchers warn
6) Marijuana Damages Sperm?
7) Marijuana smoking damages sperm
8) Pot Use Might Be Linked to Abnormal Sperm
9) Marijuana use may affect the size and shape of men's sperm
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