Hi ladies

I just thought I'd get some thoughts on the best method for taking your temp when charting? I have read that oral, vaginal and auxillary (underarm) are all ok, but I was wondering what the best way was? Also how long does it take for your thermometer to beep? I havd recently got a digital and the timer is only 30sec. Wasn't sure if that was long enought to get a good bbt?