"This is a very troubling turn, that in the 21st century the culling of females is once again becoming more prevalent worldwide," she wrote in an email interview.
Nature favors boys at birth, with a consistent worldwide gender ratio of about 105-107 males born for every 100 females. But females eventually catch up. Girls have greater resistance to disease right from the start; they don't take as many risks, from playfully jumping out of trees to drinking and driving; they're less likely to fight in wars or barrooms; and overall women live longer than do men. In developed countries, like the U.S., the U.K., and Canada, women begin outnumbering men at about age 55."
Read article by Susan Brink from NPR.