Translation of "Prematurely" in Spanish

My wife gave birth prematurely to a 1,500-gram baby girl.

Mi mujer dio a luz prematuramente a una niña de 1500 gramos.

Whatever the case, seeing the Anglo-Gascons retreating, Audrehem prematurely charges towards

Cualquiera sea el caso, al ver a los anglo-gascones retirarse, Audrehem carga prematuramente hacia