Bountiful

 is a hero trait.

Special acquisition
During the random event Complications, if the ruler chooses to place the mother in the Chalice during the troubled childbirth, there is a one in three chance she gains this trait.

Mechanics
This trait applies a persistent 150% multiplier to a hero's Fertility. This effectively does to same to his or her daily chance of conceiving a child as a regent or partner. There is a limit on a hero's fertility of 150% of the default fertility of heroes in young age, so this trait will put young heroes with no other modifiers right at the cap.

This effect is per hero, though, so when two Bountiful heroes are married together, assuming no other Fertility modifiers, their daily chance of conception is 225% of normal for their ages.