So in cellular years, the first President of the United States lived 91 years. Why? Because the first cell that becomes a person forms in the maternal grandmothers womb.
Basically when George Washington's mother (Mary Ball Washington) was in the womb of her mother in 1708, the egg of Washington appeared in this universe.
Thus, when George Washington's maternal grandmother was pregnant with Mary Ball Washington, the first cell of George Washington appeared, oddly as it may sound inside of Grandma.
That is why pregnant women are so magical, they carry the next and 'next next' generation - about five months after they get prego.