Fig. 5. A1, Dorsopalmar radiograph of a 320-d gestation foal. Note the rounding of the cuboidal bones and increased joint spacing. A2, Dorsopalmar radiograph of a 320-d gestation foal at 30 d post foaling. Note the marked increase in angulation of cuboidal bone margins and appropriate joint spacing. B1, Lateral radiograph of a 320-d gestation foal. Note rounding of cuboidal bones and increased joint spacing. B2, Lateral radiograph of a 320-d gestation foal at 30 d post foaling. Note the marked increase in angulation of cuboidal bone margins and appropriate joint spacing.