Mobile phones may damage men's sperm, Hungarian scientists say, in a study that fertility experts dismissed Monday as inconclusive. Carrying a mobile in hip pockets or a holster on the waist could cut sperm count by nearly 30 percent, according to the research.

"The prolonged use of cell phones may have a negative effect on (sperm production) and male fertility," Dr. Imre Fejes, of the department of obstetrics and gynecology at the University of Szeged said in a summary of the study.

Fejes and his team analyzed sperm from 221 men and questioned them about their use of mobile phones. They found correlations between the use of the phones, even in a standby setting, and reduced sperm concentration and quality.

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