Eingana

In Australian Aboriginal mythology, Eingana is a creator goddess and the mother of all water, animals, and humans. She is a snake goddess of death who lives in the Dream time. She has no vagina; she simply grew in size and, unable to give birth to the life inside her, had the god Barraiya open a hole with a spear near her anus, so that labor could commence. Eingana holds a sinew that is attached to every living thing; if she lets go of one, the attached creature dies.
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[Aboriginal] The Australian natives call her, Mother Eingana, the world-creator, the birth mother, maker of all water, land, animals, and kangaroos. This huge snake goddess still lives, they say, in the Dreamtime, rising up occasionally to create yet more life. This primordial snake had no vagina; as her offspring grew inside her, the goddess swelled up. Eventually, tortured with the pregnancy, Eingana began to roll around and around. The god Barraiya saw her agony and speared her near the anus so that birth could take place as all creatures now give birth. She is also the death mother. They say Eingana holds a sinew of life attached to each of her creatures; when she lets it go, that life stops. If she herself should die, they say everything would cease to exist.