M is 18 months, and when she was born, we got a functional thermometer from the NICU. However, it took a LONG TIME to work, and that wasn't ideal with a squirmy baby. They recommended only underarm temps. We bought several thermometers on Amazon but they sometimes worked and sometimes were frighteningly low, which of course is not okay because how do you know when it is working? We would repeat it, try it on ourselves, etc. and could still never get a temp that seemed accurate. We are expecting a new baby and we need to be able to take his temp. Better if we can get it on Amazon. Thanks!