by JivinJ, host of the blog, JivinJehoshaphat

• Here’s a classic B-word slip in a Slate article discussing how the placenta works, entitled, “Your fetus is an alien”:
  

  [NYU’s Adrian] Erlebacher’s not the only one studying this stuff. [Harvey] Kliman, the Yale researcher, also investigated human placentas, and his findings suggest an entirely different mechanism in play. Kliman suspects that a specific protein in pregnant women, called PP13, acts as a decoy of sorts to trick the mom’s immune system to stay away from the baby.