Charting your Basal Body Temperature (BBT) is easy. Basically, what you are doing is taking your temperature first thing each day and plotting the temperature on a chart. What you are looking for is to see a shift of at least .4 degrees Fahrenheit after ovulation, making your chart biphasic (biphasic: low temperatures in the follicular phase before ovulation, and higher ones n the luteal phase after ovulation).


Read here more about ovulation calendar bbt charting instructions