Ear thermometer for BBT?
I became interested in charting when I heard about it on mothering. So I ordered Taking Charge of Your Fertility, and signed up for fertility friend. I've been attempting to chart for a couple weeks my BBT in the morning using an ear thermometer, but just read in the book that ear thermometers aren't good for taking your BBT. I wonder if the ear thermometers weren't as advanced back when the book was published, I have an older copy of the book, so 19 years ago. Perhaps they've improved technology wise, and work alright for it nowadays? Anyone chart using an ear thermometer and see a thermal shift and have no problems? Or should I go buy a new thermometer?