Many women planning a pregnancy can find out about their new position even before the test shows two stripes. The implantation retraction of basal temperature, which can be clearly seen in the graph below in the article, will help in this.
Temperature method
Measuring basal temperature is a common method that is used both to protect against unwanted pregnancy if a woman has a regular partner, and to determine the most favorable days for conception during the cycle.
Ovulation can be determined by three days of high temperatures (above 37 degrees Celsius) around the middle of the cycle. Prior to this, the temperature is kept at about 36.2-36.7 degrees. If conception has taken place, then the temperature will not decrease in the future and will remain at the level of 36.8-37 degrees or a little higher until the date of the proposed menstruation.
If pregnancy has not occurred in the current cycle, then a few days before the next menstruation, the temperature will drop slightly. But each organism is individual. Some women, for example, confused dropping with a decrease in BT before menstruation. This is possible with late ovulation or if fertilization did not occur immediately after intimacy, but only the next day or later.
So, implantation retraction is a short (one day) and insignificant (maybe only 0.2 degrees) decrease in basal temperature, which occurs about the twentieth day of the menstrual cycle. This is an imperceptible, but quite true sign of pregnancy.
Mechanism of occurrence
From a physiological point of view, implantation retardation is explained by a decrease in the production of the hormone progesterone. An increase in temperature is caused by the high content of this biologically active substance in the blood. In the event of pregnancy, progesterone is produced simultaneously with estrogen. Implantation retraction is explained from a medical point of view by the interaction of these two hormones in the body of a woman.
When is the falling
A decrease in temperature after a certain time after conception is evidence of the introduction of a fertilized egg into the uterus, on the graph this is reflected as implantation retraction. What day after intercourse, which led to conception, does this usually happen?
It is important to know that this phenomenon is short-term (lasts no more than one day) and not all women can note it. In order to distinguish implantation retardation from simple temperature fluctuations for some other reason, you need to keep graphs for several months.
Generally speaking, a woman can notice changes in the chart six to seven days after sex. This is implantation retraction. What day does the temperature drop? With a 28-day cycle, this can happen on about 18-21 days. And even then, provided that ovulation falls about the middle of the cycle, and the sperm fertilized the egg within a few hours. Sometimes this process takes several days, but the sperm can remain viable in the genital tract of a woman for about a week.
Bloody issues
Often, implantation retraction is accompanied by minor bleeding. Minor spotting appears when the embryo is introduced into the uterine cavity (in this case, superficial vessels are damaged). Bleeding lasts no more than two days, it is very scarce (usually one daily laying is enough). May be accompanied by minor pain in the lower abdomen.
Implantation bleeding occurs in approximately 20% of expectant mothers. Its absence or presence does not mean pathology. From the point of view of physiology, minor spotting during the introduction of a fertilized egg is quite possible and does not indicate pathology. A doctor should be consulted if the bleeding is profuse, lasts more than two days, accompanied by intense pain in the lower abdomen, nausea and vomiting.
Determination accuracy
Implantation temperature drop is, it seems, a sure sign of pregnancy, but is it really so? Even if the picture of retraction is clearly visible on the graph, this does not necessarily mean that the conception was successful, and the embryo has already invaded the uterine cavity and continues to develop. Not always a decrease in temperature indicates the onset of pregnancy.
For the method to work accurately, you need to measure BT for at least three consecutive months. In addition, medication, stress or insomnia, change of weather and the like can affect the temperature. A pregnancy test after a delay in menstruation will help determine the “interesting position” more accurately, and implantation retraction is just an indirect sign.
No dropping on chart
Many women who regularly measure BT begin to panic when they see two bars on the test of their menstruation, but there is no implantation basal temperature retraction on the chart. In fact, there is no cause for concern. First, implantation may not be accompanied by a decrease in basal temperature. Secondly, sometimes the depression is so imperceptible that a woman simply does not pay attention to him. Thirdly, various factors can affect the measurement results, as a result of which the temperature will be slightly higher or lower than real. Those who are very worried about this can only be advised to visit a gynecologist so that the doctor confirms the onset of pregnancy.