Abstract: “A collection device for self-collecting bodily substances can take the form of a sanitary napkin comprising a porous outer sleeve opened at one end thereof and including upper and lower sheets. The lower sheet is outwardly provided with an impermeable sheet coated with an adhesive covered with a removable protective peel-off strip. The sanitary napkin comprises between the upper and lower sheets an absorbent layer and a removable sampling filter. The filter is slidably received in the outer sleeve, extends between the upper sheet and the absorbent layer and is removable from the sanitary napkin once bodily substances have collected thereon for being then sealingly packaged and stored until its analysis. The sampling strip can also be made more or less integral with the sanitary napkin such that the complete napkin is forwarded by the end user to the laboratory.