Men with lots of brothers 'more fertile'

Dominant male

If you are looking for a man who will give you a big family, first make sure you count how many brothers he has, researchers suggest.

A new study has found that the greater the number of male siblings your husband has, the more fertile he is likely to be, the Daily Mail reported.

They have discovered that men with mostly brothers are likely to be more productive.

The findings also support the theory that parents with genes for good male fertility are more likely to have boys. Normally, in Britain 105 boys are born for every 100 girls.

Experts from the University of Sheffield assessed 500 men and compared the travelling speed of their sperm with their family make-up.

Dr Allan Pacey, one of the researchers from the University of Sheffield, said: "We found the greater number of brothers rather than sisters a man has, the faster his sperm is, increasing the likelihood of fertility. Lots of brothers is also an indication that the man's parents have strong male fertility genes, and they would then be passed on to the son."

"The results are very surprising and could provide genetic insights into why some men are more fertile than others. The research did not give any clues as to how to treat male infertility," Dr Pacey said.

"It does, however, give food for thought about the importance of genetics for sperm motility and may open the way to more studies in this area," he added.

Sperm activity or "motility" is known to be a major factor influencing male fertility.

The findings are published in the Asian Journal of Andrology.

Please read our terms of use before posting comments
TERMS OF USE: The views, opinions and comments posted are your, and are not endorsed by this website. You shall be solely responsible for the comment posted here. The website reserves the right to delete, reject, or otherwise remove any views, opinions and comments posted or part thereof. You shall ensure that the comment is not inflammatory, abusive, derogatory, defamatory &/or obscene, or contain pornographic matter and/or does not constitute hate mail, or violate privacy of any person (s) or breach confidentiality or otherwise is illegal, immoral or contrary to public policy. Nor should it contain anything infringing copyright &/or intellectual property rights of any person(s).
comments powered by Disqus