The inability to become pregnant can cause a great deal of stress – hassles with clinical ovulation tests and planned intercourse. For her graduation project, industrial designer Cora Man devised a solution for the problem of calendar sex: the Cycle-Observation-Ring-Application for vaginal use. She called her solution CORA, adding the word ‘With’ to create a sense of friendly intimacy. The oval ‘With CORA’ device is inserted around the cervix after menstruation, and it communicates with the user’s mobile phone by Bluetooth, providing constant readings of the user’s body temperature. ‘If it is 0.4 degrees higher than normal, the user is ovulating and knows that it’s time for action’, explains Man. Or not, of course, as the ovulation meter can also be used for the opposite purpose – avoiding intercourse on fertile days.