Talk:Touka Kirishima/@comment-27347196-20170424132000/@comment-178.2.215.34-20170424214753

Something different regarding this topic. Have you heard of the biological case of hybridsterility. To give a summary: There are cases where two different species can mate and have children. (Horses and zebras or different kinds of mice and rats for example) But their offspring on the other hand is not able to reproduce because of them having mixed blood prevents the sperm-production to work properly.

To address the point of Anon: Your normal body cells have no impact on your ability to reproduce whatsoever. So Kaneki having more ghoul or human cells doesn't matter. What does is the condition of his genes. To be more accurate the genes which are responsible for the production of his sperm cells.