Menstrual calendar

Claim 1

A MENSTRUAL CALENDAR COMPRISING: A BOTTOM DISC HAVING THE CIRCUMFERENCE THEREOF DIVIDED INTO TWELVE ANGULAR INCREMENTS REPRESENTING THE CALENDAR MONTHS, SAID MONTHLY INCREMENTS BEING SUBDIVIDED INTO DAILY INCREMENTS; AN INTERMEDIATE DISC OF SMALLER RADIUS THAN SAID BOTTOM DISC HAVING THE CIRCUMFERENCE THEREOF INVIDED INTO A PLURALITY OF UNIFORMLY SPACED INCREMENTS OF PROGRESSIVELY INCREASING ANGULAR DISTANCE REPRESENTING SHORTEST MENSTRUAL CYCLE OF INCREASING DURATION, SAID SHORTEST MENSTRUAL CYCLE INCREMENTS EACH HAVING A BEGINNING-OFCYCLE INDEX AND AN END-OF-CYCLE INDEX; AND UPPER DISC HAVING A RADIAL LENGTH INTERMEDIATE OF THE RADIAL LENGTH OF SAID INTERMEDIATE AND BOTTOM DISCS AND A REDUCED RADIUS PORTION DEFINING AN INDENTATION IN THE CIRCUMFERENCE OF SAID UPPER DISC THROUGH WHICH A SELECTED SHORTEST MENSTRUAL CYCLE INCREMENT AND A PORTION OF SAID MONTHLY AND DAILY CALENDAR INCREMENTS ARE VISIBLE WHEN SAID DISCS ARE ASSEMBLED IN SUPERPOSED RELATION, SAID REDUCED RADIUS PORTION HAVING A PREDETERMINED ANGULAR DISTANCE SUFFICIENT TO EXPOSE THE LONGEST SELECTED CYCLE INCREMENT WITHOUT EXPOSING MORE THAN ONE SELECTED CYCLE INCREMENT WHEN THE CALENDAR IS SET FOR THE SHORTEST CYCLE INCREMENT; AND, MEANS FOR SECURING SAID DISCS IN SUPERPOSED RELATION FOR ROTATION ABOUT A COMMON AXIS.