To measure basal temperature, a method called "fertile phase by basal temperature change" is used. This method is explained by the fact that different phases of the menstrual cycle have different temperature fluctuations. This suggests that in these very different phases of the cycle, different levels of hormones are determined, which show the temperature.
It is necessary
Thermometer
Instructions
Step 1
During the menstrual cycle, a woman's temperature is always elevated (37.0 and higher). During the first phase of the cycle (follicular) until ovulation, the temperature is low, approximately 37.0 - 37.5 degrees.
Before the period of ovulation, the temperature decreases, and after ovulation, it immediately rises by 0.5 degrees (to about 37.6 - 38.6 degrees). Such an increased temperature lasts until the next menstruation. If a woman is pregnant, then there will be no menstruation, and the fever will persist throughout the pregnancy.
Step 2
There are some recommendations for measuring basal temperature:
- Temperature can be measured in the mouth, vagina or rectum.
- The temperature should be measured every morning at the same time without getting out of bed and immediately recorded. It is also recommended that you continue to measure and record your readings during your menstrual period.
- You should also measure your temperature after at least three hours of uninterrupted sleep.
- It is recommended to measure the temperature with the same thermometer.
- It is imperative to note all the side factors (stress, depression, moving, sex, etc.). This will later make it possible, when decoding, to understand why there were deviations in the temperature graph.
- It is necessary to record the readings of the thermometer immediately, so as not to forget about them later.
- It should be noted that for an accurate schedule, it is necessary to conduct observations for at least 3 months.
Step 3
If the high temperature persists for 3 days longer than during the normal phase of the corpus luteum (this phase after ovulation until the next menstrual cycle is characterized by high temperatures - above 37.0 degrees), the likelihood of pregnancy is high.
Step 4
If the first phase of menstruation is unstable and may fluctuate, then the phase of the corpus luteum is very stable and is approximately 12-14 days. It is very important to follow the second phase, not the entire cycle.
Step 5
Typically, the graph is divided into two phases: first - the phase of low temperatures, and then, immediately after ovulation, it rises sharply, and is called the phase of the corpus luteum (high temperatures). If, after the second phase, an additional upward temperature jump (sometimes gradual) appears, the graph becomes three-phase and the likelihood of pregnancy is high.
Step 6
If 18 high temperatures are observed in a row, then pregnancy has come for sure.
