In Egyptian mythology, Mehturt ("great flood"; also Mehurt, Mehet-Weret, Mehet-uret) . Her name means “Great Flood.” Some of the titles of Mehet-Weret were “Lady of Heaven and Earth” and “The Great Cow in the Water.” Mehet-Weret was a goddess of the sky, and represented the waterway in the heavens, sailed upon by both the sun god and the king. The Egyptians called the Milky Way the “Nile in the Sky,” and believed it to flow from the udders of Mehet-Weret. Mehet-Weret was also a goddess of the yearly inundation of the Nile. There was a funerary bed found in the tomb of Tutankhamen, in the form of the goddess Mehet-Weret. As a manifestation of primeval waters, she was considered to be the mother of Ra. Sometimes Mehert-Weret appears in birthing scenes as a herald of imminent birth. The Great Flood is when the waters of the ammonitic sac break to signal that the child will soon emerge. Egyptian mythology (or Egyptian religion) is the name for the succession of beliefs held by the people of Egypt until the coming of Christianity and Islam. ... A falling water droplet Water (from the Anglo-Saxon and Low German wæter) is a colourless, tasteless, and odourless substance that is essential to all known forms of life and is the most universal solvent. ...
Mehet-Weret was pictured as a cow lying on a mat of reeds, holding the sun disk between her horns, sometimes wearing a menat (musical necklace). Occasionally she was pictured as a woman with a cow’s head and protruding breasts, holding a scepter entwined with a lotus flower. The sound of rustling papyrus plants were believed to announce Mehet-Weret’s approach, as she parted the rushes with her horns. A popular goddess throughout ancient Egyptian history, Mehet-Weret’s name was still in use even into the Greek period. Cows at a small farm in Maryland. ... Cows at a small farm in Maryland. ...
She was originally seen as the daughter of Ra, the creator, whose own cosmic birth was formalised as the Ogdoad cosmogeny.
Due to this, and the name mehturt, she was identified as responsible for the yearly inundation of the Nile.
Another consequence of this name is that she was seen as a herald of imminent birth, as when the amniotic sac breaks and floods its waters, it is a medical indicator that the child is due to be born extremely soon.