A dispensing system for the interior of a dishwashing machine includes a component carrier on which components are detachably or nondetachably arranged, including at least a dispensing chamber, an actuator, and a closing element as well as an energy source andor a control unit andor a sensor unit. The control device can be connected to at least one external device, and includes a display unit which generates and displays a frame; and a control unit which controls the display unit to add at least one frame corresponding to each of the at least one external device or to pre-installed applications. The lampshade has at least a side-wall and a top-wall connected the side-wall. Members of the peer-to-peer network can choose whether or not to receive a file from another member based on a trust level or reputation associated with the member. Hereby a ventilation device is accomplished, whereby, in particular circumstances, it is possible to regulate the amount of air and the temperature in the air space of the window and hence of the room in the building, as it is hereby ensured that a certain amount of air is supplied to the room of the building. The invention also relates to methods of improving pregnancy success by timely supply of progesterone or a functional equivalent thereof ; to methods of assessing suitability for progesterone replacement therapy; and to methods of embryo transfer.