Yevamot 59: The Restrictive Marital Status of the High Priest

A new mishnah - this time, on the marriage restrictions on the kohen gadol, the high priest. He is not permitted to marry a divorcee... Nor a grown woman, which of course needs a lot of unpacking... Nor a woman whose hymen is not intact - the focus here is most definitely on virginity. What was the reality of all this for the kohen gadol? And to what degree did the sages expect any of these cases to happen? But why is she described as being "not a grown woman"? A clear dispute, and the majority position is that she can be an adult,