She's got no legs.
Come on. We've done this a million times. All through school, all through college while taking notes. It's based on hieroglyph B1. It's needed for woman, for lady, for goddess, for wife, for sister, and children. We did this ten million times as hieroglyph.
We drew it so many times writing that everybody, all of us scribe types, got sick of drawing it, honestly, it's wearisome, and the whole thing developed to a shortcut in cursive so B1 came out looking like this in hieratic:
And the classic hieroglyphs were leaned upon heavily for all manner of wall art repeatedly all over the place.