Study: Men who have the most number of brothers males are more fertile

The new study found that men who have a greater number of brothers males are more fertile.The newspaper
"Daily Mail" that the British researchers at the

University of Sheffield found that the greater the number of male siblings of the husband, the more likely fertility.

The study included 500 men, the researchers compared the speed of movement of their sperm with the structure of their families.

Said study co-author now Bassey: "We found that the greater the number of brothers from sisters in men, the greater the speed of his sperm greater than the likelihood of fertility," and added that many brothers indicates also that the man's family genes fertility masculine strong, and thus are will move to his male children.

He pointed out that the results were a surprise and could provide the genetic vision for the reason that some men are more fertile than others.

The scientists said this does not mean that men who have a large number of sisters to worry about, but pointed out that they did not consider whether the women that have a large number of sisters, more fertile.