Men who keep their phone in their trouser pocket are being warned it could damage their chances of becoming a father.
A new study has found that keeping a mobile too close to certain body part of the body can risk 'cooking sperm'.
The study - which was carried out in Israel - also found that talking on a mobile for more than an hour a day or while a phone is charging is even more dangerous and could double the liklihood of lower sperm concentration.
Dr John Kennedy from SIMS fertility clinic in Dublin says phones should be kept in a jacket pocket instead:
