Quick question????????

Question

OK MY FRIEND HAS RECENTLY STARTED ON TTC I TOLD HER TO START TRAKING HER BBT BUT HER QUESTION IS SHE SIAD THAT SHE WENT TO THE HOSPITAL AND THAT THERE THEY GAVE HER A THERMOMETOR IF SHE CAN USE THAT ONE IT HAS THE LETTERS BD ON IT DOSE IT MEAN SHE CAN USE THAT ONE .....

Answer 1

A thermometer is a thermometer. A digital one with one decimal point reading is obviously easier to read for keeping track, but any thermometer that is accurate is fine.