A new study has found that men with more brothers than sisters may have faster swimming sperm and increased fertility.
Dr Jim Mossman, who led the research said: “This is certainly not a
smoking gun as a reason for infertility in men. However, it would be
interesting to test whether the same relationships are observed in other
human populations as well as in other species. Likewise, would we
observe similar associations when looking at female fertility? If the
relationship between sex-bias in the number of children and fertility is
a more universal phenomenon, then we may expect female fertility to
follow a similar pattern, albeit in the opposite direction.”
Read more: http://bit.ly/XKxWMZ
Dr Jim Mossman, who led the research said: “This is certainly not a smoking gun as a reason for infertility in men. However, it would be interesting to test whether the same relationships are observed in other human populations as well as in other species. Likewise, would we observe similar associations when looking at female fertility? If the relationship between sex-bias in the number of children and fertility is a more universal phenomenon, then we may expect female fertility to follow a similar pattern, albeit in the opposite direction.”
Read more: http://bit.ly/XKxWMZ
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