Question: Do men have a biological clock too? 

Answer: Not really, men can have children much later in life than women.  Women know they only have a handful of years to have children, so they 'hear their biological clock ticking,' when they are getting close to the age when childbearing becomes difficult or impossible.  Men, on the other hand, can have children basically from puberty into their seventies and even eighties.
This question from the Yahoo Q&A forum is categorized in the topic: Business & Finance