The invention relates to a method for monitoring excrement data of at least one absorbent article for seeking a pattern of excrement events for a monitoring period. The at least one absorbent article being associated with a person wearing said at least one absorbent article. The method comprises acquiring excrement data comprising data for at least two time periods, each substantially corresponding to the monitoring period for which a pattern of excrement events is sought； providing a series of sequential non-overlapping time intervals, together extending substantially over the monitoring period； and associating the time mark of each associated excrement event with a corresponding time interval.The excrement data comprises information in form of excrement events into said associated absorbent article, and wherein each excrement event has an associated time mark or associated time information from which an associated time mark may be derived. The invention relates also to a data processing unit for monitoring the excrement data, adapted to perform the method for monitoring excrement data. The invention relates also to a system for monitoring excrement data. The system comprises a sensor associated with an absorbent article, which sensor is arranged to generate an output signal representative of the excrement state of said absorbent article； and a data processing unit adapted to process said output signal generated by the sensor. The data processing unit is adapted to provide a series of time intervals； and associate the time mark of each excrement event with a corresponding time interval.L'invention concerne un procédé pour surveiller des données d'excrément d'au moins un article absorbant pour chercher un modèle d'événements d'excrément pendant une période de surveillance. Ledit article absorbant est associé à une personne portant ledit article absorbant. Le procédé consiste à acquérir des données d'excrément comprenant des données pour au moins deux périodes, chacu
