Carrying a mobile phone could significantly affect a man's fertility, scientists have suggested
Radiation from the phones could cut the number of sperm a man has by a third, researchers from the University of Szeged, Hungary, said.The research, presented to the European Society of Human Reproduction and Embryology (ESHRE) meeting in Berlin, studied over 200 men.
But other experts have criticised their research, saying it did not take any other aspects of the men's lives into account.The Hungarian study is the first to look at how electromagnetic radiation from mobiles could affect sperm.
The men who had their phone on standby throughout the day had about a third less sperm than those who did not. High numbers were found to be swimming abnormally, reducing the chances of fertilisation.
The researchers say their findings suggest that mobiles do have a "negative effect" on male sperm and fertility.But other experts at the ESHRE conference said the Hungarian study did not allow for other factors which could have affected the men's fertility.
Professor Hans Evers, the former chairman of the European Society of Human Reproduction, said it "raises more questions than it answers".Other factorsHe said the study had not taken into account the "many potential confounding factors which could have skewed the results".
These could include whether the men who had affected sperm came from a different social class or age range than those who did not.It was also unclear whether the men were carrying their phones in their trouser pockets, close to their bodies, or in briefcases away from them.
He said: "These factors would have a considerable effect on the outcome of the research."Professor Evers added: "Mobile phones are related to a certain lifestyle and they may be related to stress, to a heavily occupied business man rushing around from one office to another, having a lot of concerns in the life; there's all kind of things."
And it is known that this decreases sperm counts and if you compare that to farmers living in the open air, on the land and not carrying a mobile phone at all you can explain the difference by completely other ways than the use of a mobile phone.
"He said the only way to get a clearer picture would be for scientists to carry out a study which was carefully designed only to look at the effect of mobile phones on sperm.
Heavy use of mobile phones may damage men's fertility,
A study has suggested.Researchers found those men who used a phone for four hours or more a day had fewer sperm and those they had moved less well and were of poorer quality.
The Ohio study involving 364 men was presented to the American Society for Reproductive Medicine in New Orleans.But a UK expert said it was unlikely the phones were to blame, as they were in use and not near the testes, and it may be being sedentary was the cause.
If you are holding [the phone] up to your head to speak a lot, it makes no sense that it is having a direct effect on your testesDr Allan Pacey, British Fertility SocietyThe team from the Cleveland Clinic Foundation in Ohio tested the sperm of 364 men who were being treated at fertility clinics in Mumbai, India, with their partners.
It was found that the heaviest users, those who used their phones for more than four hours a day had the lowest average sperm counts, at 50 million per millilitre (ml) and the least healthy sperm.
Men who used their phones for between two and four hours a day averaged sperm counts of 69 million per ml and had moderately healthy sperm.Those who said they did not use mobile phones at all had the highest average sperm counts, of 86 million per ml, and their sperm was of the highest quality seen.
'Used without thinking twice'Dr Ashok Agarwal, who led the research, told the New Orleans conference the study did not prove mobiles damaged fertility, but said it showed more research was warranted."There was a significant decrease in the most important measures of sperm health and that should definitely be reflected in a decrease in fertility, which is seen worldwide.
"People use mobile phones without thinking twice what the consequences might be."It is just like using a toothbrush, but mobiles could be having a devastating effect on fertility."It still has to be proved, but it could be having a huge impact because mobiles are so much part of lives.
"He suggested radiation from mobile phones might harm sperm by damaging DNA, affecting the cells in the testes which produce testosterone or the tubes where sperm is produced.
But a British expert cast doubt on the suggested link between mobile phone use and infertility in the men studied.Dr Allan Pacey, senior lecturer in andrology at the University of Sheffield, said: "This is a good study, but I don't think it tackles the issue.
"If you're using your phone for four hours a day, presumably it is out of your pocket for longer."That raises a big question: how is it that testicular damage is supposed to occur?"Dr Pacey, who is honorary secretary of the British Fertility Society, added: "If you are holding it up to your head to speak a lot, it makes no sense that it is having a direct effect on your testes.
"He added that people who use phones for longer might be more sedentary, more stressed or eat more junk food, which might be more likely explanations for the link found in the study.
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