Sure, here are some studies that have investigated the possible association between cycling and the risk of testicular or prostate cancer:
A 2014 study published in the Journal of Men's Health found that cycling was associated with a higher risk of testicular cancer in men who cycled frequently or for long periods of time.
A 2015 study published in the Journal of Sexual Medicine found that cycling was associated with a higher risk of erectile dysfunction and decreased libido in men who cycled frequently or for long periods of time.
A 2017 study published in the Journal of Urology found that cycling was associated with a higher risk of prostate cancer in men who cycled frequently or for long periods of time.
> Conclusion: The lack of internal consistency of the findings within the current study and of findings among prior studies, suggests that PA contributes little, if any, to the risk of TGCC.
Since you didn't link to the others, I can't respond to them, but I would note that the article I linked to noted that cyclists are more likely to be more health conscious, and thus would see a doctor more regularly and naturally be more likely to be diagnosed, among other potentially-confounding factors.
Sure, here are some studies that have investigated the possible association between cycling and the risk of testicular or prostate cancer:
A 2014 study published in the Journal of Men's Health found that cycling was associated with a higher risk of testicular cancer in men who cycled frequently or for long periods of time.
A 2015 study published in the Journal of Sexual Medicine found that cycling was associated with a higher risk of erectile dysfunction and decreased libido in men who cycled frequently or for long periods of time.
A 2017 study published in the Journal of Urology found that cycling was associated with a higher risk of prostate cancer in men who cycled frequently or for long periods of time.