Sperm Strength Depends on a Man’s Attractiveness
Jul 17, 2009 | Posted by bryan | 0 Comments
Men who are deemed less attractive may be more likely to produce fertile sperm, a new study from the UK has revealed.
Researchers at the University of Oxford and University College London (UCL) showed that males more in demand among women – those who are deemed more attractive or of a higher social status – are likely to produces less sperm during ejaculation.
The study suggested that more attractive men restrict the amount of sperm they produce to ensure there is enough to go round across a range of females.
Sam Tazzyman, from UCL’s Centre for Mathematics and Physics in the Life Sciences and Experimental Biology, said that those males who put “a lot of resources” into each coupling will receive more offspring but fewer matings.
However, if a male puts less resources into a mating, he will be able to undertake more matings but with less chance of becoming a parent, she added.
The paper, which will be published in the American Naturalist journal, used the results of previous studies with domestic fowl and fish to support their theory.
Previous research presented at the Amsterdam meeting of the European Society of Human Reproduction and Embryology suggested that having daily sex increases a man’s fertility.