Men should avoid wearing tight underwear as constricting pants are more likely to cause less fertile sperm, fertility experts warned.
According to the Telegraph, University of Sheffield Professor, Allan Pacey, explained that a study of 2500 men across the UK had found that wearing tight underwear was the “single biggest risk” factor for fertility, more than smoking or alcohol consumption.
Gynaecologist Dr Gillian Lockwood said that the modern liking for close-fitting undergarments went against thousands of years of human practice.
Pacey also said that men should start trying for a family before 40 if they want to have children.
He added that the quality of a man’s sperm significantly decreases past the age of 40, and that studies show children born to fathers above that age are more likely to have conditions like schizophrenia, autism and Down Syndrome.
Pacey said the fertility problems caused by couples waiting later before trying to start families could not simply be solved by men freezing their sperm when they are young.
“You can’t just go to the freezer when you are ready and take out your little sample of sperm and take it home.”
The experts further warned that the quality of the sperm might diminish during freezing.