Tips For Charting
Charting your temperature may sound hard, but it’s really not. There are a few things to keep in mind, however, so your temp is as accurate as possible.
Get a good thermometer
You can get a good thermometer just about anywhere, but make sure to get a digital one that temps to the hundredth spot (for example, 98.87 instead of 98.9). You might also look for one that has a backlit display (handy in the early morning) and a memory function. A good thermometer can cost as little as $10 at a store like Walgreens.
Temp at the same time
The most accurate temperatures are ones that are taken at the same time each day. If you rise for work at 6 am, it’s best to set your alarm for the weekend and temp then as well. Of course, you can always try to go back to sleep if you can! And your temperature is also the most accurate if you’ve gotten at least four hours of unbroken sleep.
Temp before you move around
Don’t get up and trot to the bathroom and then take your temp -- moving around can raise your temperature, and even a slight artificial elevation can throw off your findings.
Temp under the same conditions
Try to keep reduce your mouth breathing right before you take your temperature. You should also keep your mouth closed each time you temp, and keep the temperature in the room constant if at all possible.
Even under the best circumstances, you may discover an unusually high or low temp some mornings. But overall your temperatures should follow the same pattern -- lower before ovulation, and a rise the day after ovulation until either you have a positive pregnancy test or your period begins.