BIRKS is an outer rim planet on the opposite side of the galaxy from Winterthur, but it also has some interesting lore concerning fertility.  The first explorer to reach the planet was Mrs. Lilianne Brougham, who set out
with her husband Reynold to survey the sector in twin scout ships.  Interference from electromagnetic radiation outside the atmosphere prevented her from adequately scanning the as-yet-unnamed planet Birks, but she attempted to land anyway, after sending a message about her intention to do so.  The same radiation also knocked out some of her craft's systems, causing her to crash-land in a shallow lake.  Luckily for Lilianne, the planet is perfectly habitable, but she was stranded without the ability to tell Reynold her exact location.  While exploring the area, she discovered that some of the local animals were friendly and capable of imitating human speech.  So she taught them a litany of instructions for how to find her:  "Brightest star.  Long river.  Mountain pass.  Winding lake."  These words were supplemented with pointing arrows  (made from shiny rocks or felled trees) that she constructed during her travels.  It took many days for Reynold to finally reach her, but when he found her asleep in her ship at exactly midnight, it is said that she conceived her twin children that very night.  Subsequent technological advances have made it safer to land on Birks, and many settlers have availed themselves of the opportunity.  The old markers are still carefully maintained, and tourists often make pilgrimages to the crash site.  No one knows for sure whether strange energies guarantee fertility to couples who tryst there at midnight, but if you go there please be as quiet as you can.  The animals are still listening.