I find myself thinking: what's the porpose of searching what's the easier gender to raise? Can you imagine finding a more practical way for parents to choose the baby's sex? Most parents who don't want to have a second child would certainly choose to have a girl. And taking into considaration that the specie needs both sexes, I don't know if knowing one gender it's "easier" than other would bring more disadvantages than benefits. Great article. And yes pictures helped a little bit :)