Here are the possible reasons behind male infertility, which might explain why a couple hasn't been able to have children.

Most men can only name their male ancestors going back a few generations ... The Y chromosome also keeps track of time. Small mutations occur in the DNA being passed on, and these changes build ...

Their study compared the blood of two groups of healthy male donors in their 60s - the ... body - including the blood - naturally develop mutations, which increases the risk of diseases such ...