I have used a glass basal thermometer for years now and I really like this particular one. The one I had previously was skinnier. I like this one because it is a little bigger, though I don't think it really matters. You cannot find a basal thermometer in the stores. I looked at a glass thermometer the other day in the store and it is not broken down into tenths, which I think is important. It takes only five minutes to get a temp reading and is very accuate, unlike the basal digital thermometer. Get more detail about Geratherm Basal Mercury Free Thermometer - 1 Ea.
