A fertility drug? There’s nothing in the brief article to explain this strange assumption. It’s soapstone, a soft rock. Is there some unspoken effect of soapstone upon the female reproductive system going unsaid, here? What sort of fertility “drug” could a soapstone carving be? Or, is the author just ignorant and confused?
More of a visual stimulus. Seems to have worked, they wound up with billions of living descendants. :^)
https://www.youtube.com/watch?v=NE49NdNnBxA