Passage: The seemingly uneven bargain with which "Rapunzel" opens is a common trope in fairy tales which is replicated in "Jack and the Beanstalk", Jack trades a cow for beans, and in "Beauty and the Beast", Beauty comes to the Beast in return for a rose. Folkloric beliefs often regarded it as quite dangerous to deny a pregnant woman any food she craved.  Family members would often go to great lengths to secure such cravings.  Such desires for lettuce and like vegetables may indicate a need on her part for vitamins.An influence on Grimm's Rapunzel was Petrosinella or Parsley, written by Giambattista Basile in his collection of fairy tales in 1634, Lo cunto de li cunti (The Story of Stories), or Pentamerone. This tells a similar tale of a pregnant woman desiring some parsley from the garden of an ogress, getting caught, and having to promise the ogress her baby.  The encounters between the prince and the maiden in the tower are described in quite bawdy language. A similar story was published in France by Mademoiselle de la Force, called "Persinette". As Rapunzel did in the first edition of the Brothers Grimm, Persinette becomes pregnant during the course of the prince's visits.

Question: What kind of woman did folkloric beliefs believe to be a danger to not try to satisfy?
a pregnant woman