Researchers Suggest Human Eggs “Choose” Which Sperm Will Conceive Baby

reports a new study finds human eggs “appear to ‘choose’ which sperm will become the lucky winner in conceiving a baby.” Study author John Fitzpatrick, an assistant professor in the department of zoology at Stockholm University in Sweden, said: “Human eggs release chemicals called chemoattractants, which leave a sort of chemical breadcrumb trail that sperm use to find unfertilized eggs. What we didn’t know until this study is those chemical breadcrumbs act differently on sperm from different males, in effect choosing which sperm is successful.” The study was published Tuesday in the journal Proceedings of the Royal Society.