Have a look at section 2.4 of this document:

https://www.pathophysiologyjournal.com/article/S0928-4680(09...

Some excerpts:

"Panagopoulos et al. [99] exposed fruit flies (D. melanogaster) to radiation from a mobile phone (900 MHz) during the 2–5 first days of adulthood. The reproductive capacity of the species reduced by 50–60% in modulated radiation conditions."

"The authors concluded that radio frequencies, specifically GSM, are highly bioactive and provoke significant changes in physiological functions of living organisms."

The paper references over 100 studies in total on the subject of biological RF effects.

Hey jobson, fair point. Please read my reply to exabrial below. There's a couple other commenters with salient links there, too.