BBT charting, also known as basal body temperature charting, is a method used by women to track their menstrual cycles and identify fertile and non-fertile phases. BBT refers to the body’s lowest resting temperature, which is typically measured immediately upon waking up in the morning, before any physical activity or movement.

The process involves taking your temperature every day at the same time using a basal body thermometer, which is more sensitive and accurate than a regular thermometer. The recorded temperatures are then plotted on a graph or chart to create a visual representation of the temperature patterns throughout the menstrual cycle.

The purpose of BBT charting is to detect subtle changes in basal body temperature that occur in response to hormonal fluctuations during the menstrual cycle. After ovulation, when the egg is released from the ovary, the hormone progesterone is released, causing a slight increase in body temperature. By tracking the changes in temperature over time, women can identify the day of ovulation and determine the length of their menstrual cycle.

BBT charting can provide valuable information about a woman’s fertility. Typically, a woman’s temperature will remain relatively low in the first half of the menstrual cycle, and then rise after ovulation, indicating the start of the luteal phase. By observing this temperature shift, women can determine when they are most fertile and increase their chances of conceiving if they are trying to get pregnant. Additionally, BBT charting can help identify potential issues with ovulation or hormonal imbalances.

It’s important to note that BBT charting has its limitations. It can only confirm ovulation after it has occurred and cannot predict it in advance. It is also less effective for women with irregular sleep patterns or those who experience disrupted sleep. While BBT charting can be a useful tool for tracking fertility and understanding menstrual cycles, it is often used in combination with other methods such as monitoring cervical mucus changes and using ovulation predictor kits for a more comprehensive assessment.


Leigh Moir - Master of Reproductive Medicine<br /> Bachelor of Health Science (Acupuncture)<br /> Master of Infertility (Note: this is a self appointed qualification that Leigh feels only those that have travelled the path of infertility for a number of years can truly master ~ If you know, you know…)<br /> Qualified Esoteric Acupuncturist<br /> Qualified Fertile Life TM Practitioner<br /> Qualified Practitioner of NLP<br /> Qualified Hypnotist<br /> Level III Qi-Fit Qigong Instructor<br /> Member of The Institute of Functional Medicine (currently completing certification)<br /> Diploma of Paramedical Science<br /> Co-Founder of Shamanic Heart Medicine
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