Beli termometer pengukur suhu basal tubuh. Ukur dan catatlah suhu basal tubuh Anda setiap hari selama beberapa bulan. Carilah peningkatan suhu tubuh yang berkepanjangan. Cobalah mengantisipasi terjadinya ovulasi. Pahamilah keterbatasan metode ini.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
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. Basal body thermometers are available in most drugstores and come with a chart to help you track your BBT over several months. To accurately track your BBT, you’ll need to take your temperature at the same time each day: immediately when you wake, before you even get out of bed.  Keep your BB