http://www.sciencemag.org/podcast/privacy-concerns-slow-facebook-studies-and-how-human-fertility-depends-chromosome-counts > On this week’s show, Senior News Correspondent Jeffrey Mervis talks with host Sarah Crespi about a stalled Facebook plan to release user data to social scientists who want to study the site’s role in elections. > Sarah also talks with Jennifer Gruhn, a postdoctoral research fellow at the University of Copenhagen Center for Chromosome Stability, about counting chromosomes in human egg cells. It turns out that cell division errors that cause too many or too few chromosomes to remain in the egg may shape human fertility over our reproductive lives.