[header] How to know when you are ovulating [title] Buy a basal body temperature thermometer. [step] Your basal body temperature is your lowest body temperature over a 24-hour period. In order to regularly take and monitor your basal body temperature (bbt), you'll need a basal body temperature thermometer. 
[substeps] Basal body thermometers are available in most drugstores and come with a chart to help you track your bbt over several months. [title] Take and record your basal body temperature every day for several months.