Persona
Instrument for indicating one’s infertile days. Hinged case with digital LCD display and pen. Excerpt from the Internet: “By means of test sticks, ‘PERSONA’ records the changes of the hormone Estradiol (E3G) and the Luteinizing hormone (LH) in the urine. And so it shows you the days on which you can have unprotected sex (green days) and the days on which you must refrain from having sex (red days).