Super thermometer for temperature Basalt

The thermometer works exactly as promised in the description. Quick and easy verification of the temperature possible, we have always used in the morning at 7 clock every day at the same time and watch out that my wife does not move as possible. The basalt curves look like from the textbook. Each wishing to have children I can highly recommend it, because you can watch the cycle very closely (fertile days much more accurate than on the internet with any of these "averages"), and because you can see at the end of the cycle exactly whether you have become pregnant (Basalt curve remains at the upper temperature level) or not level (Basalt curve drops back to the normal level). A cheaper and easier method, there is not probably.