How to Use Your Basal Thermometer

The Fairhaven Health Digital Basal Thermometer provides BBT temperature readings accurate within 1/10th of a degree. Especially designed for charting fertility and predicting ovulation, the BBT thermometer features:

  • A beeper to indicate peak temperature reading.
  • An large, easy-to-read digital display.
  • Memory recall of your last reading.
  • Ovulation chart.

Recording each day’s BBT temperature. By charting the pattern of temperature changes, you will be able to pinpoint ovulation, your peak time for conceiving a baby. Because BBT charting allows a woman to confirm that ovulation has taken place, it is very useful in helping you conceive. Order Now!

New to Early Pregnancy The Basal Non-Mercury Thermometer – designed specifically for fertility charting. Using a safe, environmentally alloy instead of mercury, the glass basal thermometer from Fairhaven Health offers certified accuracy for charting your basal body temperature, without the potential hazards of mercury. Comes with a no-break case that magnifies the temperature result. Ideal for maintaining an ovulation calendar. The ultimate fertility aid.

How to Take Your Basal Body Temperature  

During the first two weeks of a woman’s cycle, her body temperature is lower (96.0 to 97.5 F). With ovulation, a rise in body temperature takes place – caused by an increase of the hormone progesterone – in order to provide a warmer, more fertile environment. A minimum temperature rise of 0.4 to 0.6 degrees F can be measured. By monitoring when this temperature change takes place, you can determine when ovulation takes place in your cycle.

Take your BBT temperature first thing each morning, at the same time every day. As any physical activity can increase your resting temperature, it is recommended that you take you BBT reading before you get out of bed. Follow product directions, read the temperature to within 1/10 of a degree, and record the reading on your fertility chart or the chart provided by the BBT thermometer manufacturer.

Predict Ovulation with BBT Charting

Starting on day one of your menstrual cycle, record your BBT temperature on your fertility calendar or fertility chart. Each morning, record your temperature at the same time prior to any activity, including eating or drinking. Your temperature rise may be sudden, gradual, or in steps. The pattern may vary from cycle to cycle. For most women, 96 to 98 degrees is considered a normal basal temperature preceding ovulation. Directly following ovulation, your BBT should rise to between 97 to 99 degrees. By charting your temperature changes in one-tenth degree increments – you can determine when ovulation has taken place. Typically a rise of at least 0.4 to 0.6 degrees will take place at ovulation, though for different women the temperature increases may be sudden or gradual.

Basal Body Temperature – FAQ

How do I take my BBT?

Take your temperature first thing in the morning, prior to food, drink, or activity. Your temperature should be read lying in bed. A minimum of three to four hours of sleep is required before a BBT can be determined. Take your basal temperature even before moving around in bed. Read manufacturer directions for using your BBT Thermometer.

How does BBT Charting “Predict” Ovulation?

BBT charting helps you predict ovulation by determining fertility patterns in your cycle – allowing you to predict ovulation based on your menstrual cycle/BBT history. But because temperature increases take place just following ovulation, BBT charting tells you when you have ovulated, helping you determine when your “window of opportunity” for conception will arrive. Many women use BBT charting and Ovulation Tests together to predict ovulation with increased accuracy.

What should my BBT chart record?

The chart begins with the first day of the cycle (CD1) and monitors temperature increase on a daily basis – in one-tenth of a degree increments. Check your BBT daily at the same time and record results on your fertility chart or calendar.

What temperature changes indicate ovulation?

Following ovulation, you can record a minimum body temperature rise of 0.4 to 0.6 degrees – or more. For most women, 96 to 98 degrees is considered a normal basal temperature preceding ovulation. Directly following ovulation, your BBT should rise to between 97 to 99 degrees. Temperature baseline and increase can vary among women. Temperature changes, depending on the individual, can be gradual or sudden. Once you can identify an increase in your basal body temperature, you know that ovulation has taken place.

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