A basal temperature measurement is an accurate and free method of knowing the time of ovulation. The basal body temperature method also allows you to figure out whether your cycle is regular and whether you are pregnant.

What Is Basal Body Temperature?

Basal body temperature is the lowest temperature achieved by the entire body during rest (commonly while asleep). Basal body temperature (BBT) is one way of estimating the day of ovulation, which tells you when the best time to have sexual intercourse with your partner is to increase the chances of getting pregnant. It is your temperature when you first wake up in the morning or even following a minimum of three hours of uninterrupted sleep as well as prior to any physical action being performed.

Also known as the sympto-thermal method, this particular contraceptive method involves charting your core body temperature throughout your menstrual period. Since your temperature rises slightly around the time of ovulation, finding the sustained increase in your core temperature may alert you as to when you are most fertile within your monthly cycle.

You can also use other ways to pinpoint your time of ovulation such as:

How To Take Your Basal Body Temperature?

Your Basal Body Temperature can be obtained orally using a special BBT thermometer. Preferably, a larger thermometer which registers from 32to 35degrees is preferred. Digital thermometers are also available. Remember, you are attempting to detect as little as a two-tenths of a degree of difference in temperature, therefore choosing a high quality thermometer and following directions are very important.

Your BBT temperature pertains to a ‘resting’ or ‘base’ temperature. That means that your BBT should be measured just before any kind of physical activity, after a minimum of three to four hours of sleep. Make sure that you examine thermometer instructions and if you have any questions or even special things to consider, talk to your doctor.

Take your BBT temperature first thing each morning when you first get up. You should remain in your bed (as physical activity can increase your temperature) and avoid eating or drinking as well as moving. Put the thermometer inside your mouth or alternatively in your rectum and wait for five minutes. Look at temperature to within 1/10 of a degree and document the reading.

How To Chart Your Basal Body Temperature?

What you will need:

  • A basal thermometer (This thermometer shows minute step-by-step degree changes, in contrast to a regular thermometer).
  • paper & pen
  • alarm clock

What to do:

  • The first morning of menstrual bleeding is the start of each cycle. Indicate the monthly period with an X to the chart, starting on day 1 of cycle.
  • Insert day of month in space provided.
  • Place everything in arms reach of your bed, including the alarm clock.
  • It is best to take your BBT after not less than 5 hours sleep, and a minimum of three consecutively is preferable.
  • You may get your temperature orally, vaginally, or even rectally. Just stay with a similar technique for the entire cycle.
  • Set the alarm at the time you will get up each day. It is important to get your temperatures at the same time every morning.
  • When the alarm beeps, don’t sit up to turn it off, don’t get away from bed, roll over and turn it off.
  • Take your temperature. Place the basal thermometer straight into your mouth, although the actual temperature measured at that time is sort of higher than the real basal body temperature. This should be taken for 3 to 5 minutes. Do this every morning, even during menstruation.
  • Write it down on the chart, mark the days you had sexual intercourse by circling the temperature dot. You will need to begin a new chart at the time menstrual bleeding begins.

What Does Your Temperature Means?

For some women, 32 to 34 degrees is regarded as normal prior to ovulation and 32.5 to 34.5 degrees following ovulation. By charting the variations in one-tenth degree increments, you can figure out when ovulation has taken place. Typically an increase of at least .2 to .3 degrees will take place at ovulation, though for different women the temperature raises might be sudden or gradual. Over time, BBT chart will guide you anticipate ovulation.

You can also try our free ovulation calculator to easily pinpoint your ovulation period.

Baby Directory

X click to search
swap and share tips
with other mums
Search for a Tip...
...add a question +
×

add your question

×
X