On that related question, there was a deleted answer that stated the following (All that follows is a direct copy/paste from that deleted answer):
The study they appear to be referencing for their statement is
"Effects of Electromagnetic Radiation from a Cellular Phone on Human Sperm Motility: An In Vitro Study" (Erogul, Oztas, et, 2006, source)
To summarize, they took several sperm samples, let them rest for 20 minutes, separated them into two groups and exposed one group to an active GSM phone 10cm (~4")from the samples for 5 minutes. Immediately all sperm samples were sanalyzed for motility, and those samples exposed to the GSM phone radiation had a greater number of lower motility sperm than those that remained unexposed.
They did not analyze the sperm later to see if the effects were temporary.
They did refer to another study,
"Impact of radio frequency electromagnetic radiation on DNA integrity in the male germline." Aitken RJ, Bennetts LE, Sawyer D, Wiklendt AM, King BV. Int J Androl 2005;28:171e179 which suggested that rats who were exposed to active GSM radiation for 12 hours a day, 7 days a week showed some change in the reproduction system of male rats, but not enough to change the resulting sperm.
The takeaway of this study, as with so many cellular radiation studies appears to be that more study is needed to determine long term effects. Most of these studies merely point to the fact that RF radiation does have immediate effects on all kinds of organic tissues, but so far few have shown damaging effects that last long after the radiation has ceased.
However, I think it's a fair bet that if you want to make sure that your sperm are at their most motile, you should avoid placing a 5 minute long or longer phone call while holding the phone within 4 inches of an open dish of sperm immediately prior to needing the sperm at their most motile state. Note that your skin blocks most of the radiation at and above 800MHz from penetrating more than several mm into the body, so sperm you are carrying are unlikely to be affected unless you embed the transmitting antenna in your vas deferens.
Also, try to avoid making 12 hour long calls while holding your phone within 5cm of your testes every day. Even your reproductive organs don't have that much to talk about.
Not sure why they deleted it...