This one's for the ladies—the fertile ladies. Not only does it measure a woman's absolute exact body temperature, but presents it as a 12-day graph on the display. It works in 30 seconds, and remembers up to 480 days worth of results. What if it's nighttime and you are all snuggled up in bed ready to, uh, procreate? The Woman C has a backlight, and an alarm too (although I don't think the alarm is smart enough to sound-off when you are ovulating—that would be the ultimate).
It will be available in Japan starting December 16th for US $58.