According to a first aspect of the invention, there is provided a device for estimation of an ovulation date, comprising a camera, configured to obtain image data of successive FSH test strips and a processor, configured to evaluate the image data obtained by the camera. The processor is configured to evaluate an FSH value of each successive FSH test strip based on the image data of the camera and to output a signal, if the processor determines that a first downward trend of the FSH value is occurring in the successive FSH test strips.
