Review on Track Your Ovulation Naturally With IProven'S High Precision Digital Basal Body Thermometer by Chris Lentz

This does its job and seems to be accurate. I have been tracking for 4 months now and my temps look similar throughout my cycle. I use it during the same 30 minute period each morning, before I even sit up. The three things that I do not like about it are: 1) It takes about 60-80 seconds to register a temp. 2) The beep is loud enough to wake up my significant other. 3) No backlight. I've made it work, but if I were to buy another one, these are the additional features that I would look for.