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Basal Body Temperature

Trying to Conceive: How To Track Basal Body Temperature And Get Pregnant Faster
Trying to Conceive: How To Track Basal Body Temperature And Get Pregnant Faster

What is basal body temperature, and why does it matter when trying to conceive?


Basal body temperature (BBT) is your body's lowest temperature during the day. Your temperature will rise slightly at the time of ovulation, so charting your BBT is a relatively simple and inexpensive way of documenting your most fertile times. The difference in temperature will be slight (about 0.4 degrees), but it will stay elevated for the last half of the cycle.

To chart your BBT, you'll need a special thermometer (available at any drugstore for about $10). You'll need to take your temperature every morning at the same time, so keep your thermometer by the bed and use it as soon as you wake up. Once your temperature has remained elevated for three days, you have ovulated. The key is to chart your BBT for a least two months so you can see the pattern of your normal cycle.

The information on this Web site is designed for educational purposes only. It is not intended to be a substitute for informed medical advice or care. You should not use this information to diagnose or treat any health problems or illnesses without consulting your pediatrician or family doctor. Please consult a doctor with any questions or concerns you might have regarding your or your child's condition.