I have done traditional ballad workshops on "Sassy Lasses"--ballads about women who turn the tables on their persecutors, save the day, win bets, etc. Some examples are "The Broomfield Hill," "Tam Lin," "The Crafty Maid's Policy,", "The Baffled Knight," "The Outlandish Knight," "Maid on the Shore," "The Laird of Drum," etc.

But pregnancy, unexpected or not, looms high among women's events, whether because it was fairly continual in the days before modern forms of birth control, or because it was such an issue involving women's marriage, health, legitimacy, class, sometimes safety or even murder when her pregnancy negatively impacted some male related to or involved with her. All prophecies involve a god or hero to be borne as an infant by some woman, and, if it is to be abandoned or fostered or hidden until maturity so the prophecy can be enacted, then to be given by her or taken from her in a manner befitting the oracle, which makes for good mythology and folksingin'.