Abstract: The present invention is directed to a device (or an apparatus) and a method for providing information about body fluids. The device is for measuring a body fluid discharged from a body of a user by putting a first disposable absorbent article having a predetermined absorbent capacity to a fluid discharging portion of the user. The device comprises means for inputting an amount of the body fluid which is absorbed by the first absorbent article through observation; and means for calculating the total amount of the body fluid which was discharged by the user based on the input and the predetermined absorbent capacity of the first absorbent article.