Having a healthy sperm count is more important to men than a successful career or being popular with women, a poll revealed today.
Settling down with a partner tops life's priorities, followed by owning a property, it found.
But having good quality sperm or a high sperm count ranks equal third place with maintaining a healthy bank balance.
Being successful at work came in fourth place, followed by having a good appearance in fifth.
Men regarded being good at sport and driving a nice car as joint sixth place, while popularity with women came last, in seventh place.
The survey of 3,000 men was carried out by Government-funded charity the National Gamete Donation Trust.
It has launched a campaign to encourage men to come forward as sperm donors to tackle a national shortage.
Today's poll also found that while 13% of men believe sperm quality is their top priority, 91% underestimate the number of couples suffering infertility in the UK.
One in six couples are thought to have problems conceiving.
Laura Witjens, chairwoman of the charity, said: "As our research shows, men view their sperm count and ability to have children as crucially important in life, and the new campaign we're launching today - called Have You Got the Balls? - aims to get men thinking about sperm donation.
"In the UK, there are hundreds of couples who need a sperm donor to help them conceive the child they long for so much, either because of infertility or genetic disease.
"These couples rely on men stepping forward as sperm donors."Reuse content