Pop quiz: what’s the only organ that you grow from nothing and then casually discard, that magically bosses around your hormones, and actually your entire body, and that is actually made up of two different people’s cells?  Obviously it’s the placenta. Less obvious is how completely awesome it is. We're all wrapped up in this new baby on our chest, and since the placenta is so easy to deliver, relatively, and so gross to look at, we forget how incredible it is, and how absolutely crucial for the health of your baby. So today on ParentData, we’re going to finally give it its due. We've invited Dr. Gillian Goddard back for a mini episode to talk about all things placenta. We’re going to follow its journey through conception to pregnancy to delivery and - if you’re so inclined - beyond, and answer any of the questions you might have about this truly magical and sadly ephemeral organ.  Subscribe to ParentData.org for free access to new articles every week on data-driven pregnancy and parenting.