Laptops could kill your sperm ?

Sorry for posting here, but r/AskDocs removed my post and i didn't know where to post it. I would like to ask what are your thoughts about this i've just found.

I've been doing some googling and i found out some sources that says that the heat of a laptop (and some other practices) could make the sperm production worse(here's the source : https://academic.oup.com/humrep/article/20/2/452/603276). Another source said that also the electromagnetic waves that uses the laptop when near to the body could also make sterility more likely to happen (https://financialtribune.com/articles/people/4959/electromagnetic-radiation-can-cause-infertility). But my question is : Does it kill only the "actual production" of sperm (by killing spermatozoids taht are already produced) or does it change completely the testicles themselves by making them not working properly and making you completely infertile ?