(AP) -- It isn't only women who face a ticking biological clock when planning parenthood. New research has found that as men age, the quality of their sperm deteriorates, making it more likely they will have trouble becoming fathers and increasing the possibility of having a child with dwarfism.
Content from The Associated Press expires 15 days after original publication date. For more information about The Associated Press, please visit www.ap.org .
Explore further: The 'Angelina Effect' was not only immediate, but also long-lasting