The foramen ovale is patent till delivery. With fall in the pulmonary resistence thereafter the foramen ovale gets close by the valve. The closure is functional at first, the valve gets firmly attached to the edges of the foramen at the end of the 1st year of life.
Atrial septal defects according to the localisation:
Defect of the atrial septum: Atrial septal defect, sinus venosus, Macro, autopsy (73969)