Yes, radiation cause cellular DNA damage including alteration in Sperm count which may further lead to various sperm abnormalities and decrease in sperm count (Shahanshah Khan et al 2015). Heat exerted from a laptop or computer can warm scrotums of men and affect its functionality. The laptop’s internal electronic circuits and Wi-Fi Radiofrequency radiation may decrease quality of sperm (motrazavi et al 2016).
Yes depending on the intensity of the radiation and the resulting damage(s)
Yes, the external and internal exposure of male can cause the low sperm count. It is a non-fatal deterministic health effect of radiation and permanent. Examples of deterministic health effects resulting from exposure of reproductive organs include temporary and permanent sterility or suppression of ovulation (in females) and sperm production (in males). Permanent sterility or permanent suppression of ovulation and sperm production are considered severe non-fatal deterministic health effects because they would, in many cases, decrease the quality of life.
Dosimetric criteria for development of such effects are provided in IAEA TECDOC-1432 [ https://www.iaea.org/publications/7200/development-of-an-extended-framework-for-emergency-response-criteria-interim-report-for-comments ] and some useful details – in ICRP Publication 118 [ https://www.icrp.org/publication.asp?id=ICRP%20Publication%20118 ].
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