Babycomp and Ladycomp
Babycomp and Ladycomp are personal family planning devices. Whether you're looking for birth control (Ladycomp) or want to make a baby (Babycomp), these devices offer a totally natural solution. By monitoring your patterns and comparing them to a local database of over 700,000 women's patterns the device manufacturers claim it will accurately predict periods of fertility and infertility. All you do to use it is place the sensor under your tongue when you wake up in the morning. If you happen to be having your period, just press a button to indicate that.
$485 / $685 at raxmedical.com