A method of providing information relating to the fertility of a female mammalcomprising the steps of: (i) taking multiple temperature readings from the femalemammal during an extended period； (ii) identifying and disregarding temperaturereadings having one or more characteristics of irre levant or faulty data； (iii)obtaining one or several representative temperature values for the extendedperiod； (iv) repeating steps (i) to (iii) over multiple extended periods； (v)analysing the representative temperature values obtained over multiple extendedperiods for one or more patterns in the representative temperature values indicativeor predictive of ovulation in order to provide information relating to the fertilityof the female mammal to a user, wherein the representative temperature valuesare not the maximum or minimum temperature readings obtained for the extendedperiod； and related uses and apparatus.
