This is labelled [LINK] but I don't see the actual link, only a copy-and-paste of what may or may not be the whole article being referenced.
I think this is the article, and (admittedly on the basis of skimming only) I think what Konkvistador posted here is in fact the complete text.
Ah pardon! I've now added the link.
Related: The Psychological Diversity of Mankind, An African Folktale, many of the more interesting infanticide & abortion debates on this site
A fascinating post that however might need some background reading, most relevant material is linked in the article itself. I encourage reading up on the material.
Link to article.
Stories about changelings replacing babies and the recommended course of action being basically to expose the child is not a human universal, they are found only in European cultures. These rely more heavily on guilt and less on shame to regulate behavior than most other human societies. This may not be a coincidence. The stories look like they work as a ready made rationalization to reduce guilt from infanticide. Common problems often acquire common solutions like this.