Biological clocks are nothing new. The childless older woman or older couple has been a staple of folklore and Fairy Tales. Typically, one's first introduction to such a character will be the phrase, "Character X had always wanted a child." Which, of course, guarantees infertility. If their appearance is unusual, they often feature as the Shapeshifting Lover; either the wedding transforms them or inaugurates a time when they can switch back and forth. Examples of Wonder Child include: