First man (a group of brothers) or first human couple come out from the underworld (a cave) or from a small enclosure on its surface (tussock, reed, tree, rock, gourd)
Child is born from a tumor or swelling on person's body (on thigh, knee, finger, etc.) or is temporarily placed there or child grows from blood that flew out from a cut
Person summons with a certain signal a non-human being (usually his or her sexual partner or his or her protégé). Another person spies, uses the same signal or pronounces the same words and kills the being who comes to him (or uses this being sexually himself)
Supernatural woman comes to live with humans. Thanks to that, food becomes easily available. She is maltreated, goes away, temporal superfertility is lost forever
One woman is associated with stone, another with a plant. The plant-woman gives birth the first or the stone-woman do not have children at all. That's because people have their present characteristics (are mortal, capable to speak, etc.), or offsprings of the two women are different (skillful and not, etc.)
Person feeds others a food that is extracted from his, hers or somebody else’ body or is polluted by body extractions not informing about the source of the food