THE PRESENT INVENTION PROVIDES A BODILY FLUID-ABSORBENT STRUCTURE (10) IMPROVED SO AS TO FACILITATE BODILY FLUIDS TO DISPERSE A THICKNESS DIRECTION OF THE STRUCTURE. CORE MATERIAL (11) OF A BODILY FLUID-ABSORBENT STRUCTURE IS FORMED OF AN AGGREGATION OF FLUFF WOOD PULP FIBERS (20). THE AGGREGATION HAS A BASIS MASS IN A RANGE OF 150 TO 500G/M2 AND A SPECIFIC VOLUME IN A RANGE OF 3 TO 20CC/G. IN THE AGGREGATION, A RELATIONSHIP BETWEEN HORIZONTAL ORIENTATION INDEX IH AND SPECIFIC VOLUME VSP OF FLUFF WOOD PULP FIBERS IS REPRESENTED BY A FORMULA AS FOLLOWS: IH IS LESS THAN OR EQUAL TO -0.099VSP + 2.4. FIG. 1