[armydoc]

there is no good tree that bringeth forth evil fruit; nor an evil tree that bringeth forth good fruit. For every tree is known by its fruit. (Luke 6:43f)
-- what kind of flesh?

Was Mary "good fruit"?

[annalex]

Was Mary "good fruit"?

She was, but her birth was a natural event, of both parents, who were likewise good holy people and saints of the Catholic Church. Her cleansing from the original sin came from Christ, of course.