Although doctors working in the infertility field use a lot of high-tech gear, there's one simple tool that can provide invaluable information for those looking to conceive: a thermometer. More specifically, you'll need a thermometer that measures basal temperature.
Put simply, your basal temperature is the temperature of your body at rest.
Tracking basal temperature is important when you're trying to conceive because a woman's temperature will rise 0.4 to 0.6 degrees Fahrenheit (0.22 to 0.33 degrees Celsius) in the day or two after she's ovulated, or released an egg [source: iVillage]. Charting basal body temperature not only provides valuable information to a fertility specialist, but can also help couples pinpoint the best times each month for conception to occur. It's important to note that eggs only live 12 to 24 hours, so once your body temperature rises, the egg may no longer be viable [source: iVillage]. But by tracking basal temperature monthly, a woman can get a very clear picture of her monthly fertility cycle.