Today, quite a few women faceproblem of infertility and spontaneous interruption of the desired pregnancy. One of the causes of these unpleasant phenomena can be hormonal imbalance. In this case, necessarily on the list of examinations, there is an analysis of progesterone.
This hormone is responsible for preparing the body forpregnancy and its conservation. Progesterone is synthesized by the yellow body, which is formed in the ovaries after ovulation. It acts on the center of thermoregulation and raises temperature.
It is on this, as well as the ability of estrogento reduce it, the method of measuring rectal temperature is based. It is still actively used to determine ovulation, diagnosis of hormonal disorders and inflammation in the reproductive tract.
The main goal of progesterone is to prepare the endometrium for embryo implantation. If it is not enough, then the onset of pregnancy becomes problematic.
To determine this, you need to do a blood test for progesterone. Today it is possible in any modern laboratory. The term of the study is usually several days.
Analysis for progesterone is given in the morning on an empty stomach. It is recommended to do it on day 23 of the cycle, unless the treating doctor has appointed a different time. When measuring the temperature, the analysis should be taken 6 days after its increase.
If pregnancy does not occur, then after 2 weeks of functioning, the yellow body regresses. In this case, the level of progesterone falls and menstruation occurs.
If there is a conception, then the yellow bodybegins to function in a strengthened mode. It secrete even more progesterone, which prevents uterine contractions, stimulates its growth, depresses immunity, prevents the rejection of the embryo.
If it is not developed enough, it canthere is a miscarriage. Therefore, the analysis for progesterone in pregnancy is prescribed for women who have already had or have symptoms of it, for example, low rectal temperature, spotting, abdominal pain.
If there is a shortage, then they are appointedartificial gestagens, for example, Utrozestan and Dufaston. They are taken until 20 weeks, then the drugs are canceled, gradually reducing the dose. During this period, the placenta is completely formed, which synthesizes hormones, and the yellow body regresses.
The analysis for progesterone has the following norms:
Usually on a blank of the lab resultstheir values, which may be slightly different. The concentration of progesterone in the luteal phase at the follicular level indicates that there was no ovulation.
Low levels of hormone can occur in the following cases:
If progesterone is elevated, then the following conditions are possible:
In addition, we must take into account that the level of the hormone is affected by drugs.
The luteal phase lasts about 2 weeks, beginsit is after ovulation, and ends before the menstrual period. That is, when you pass the analysis on day 23 of the cycle, then this is just it. The follicular phase begins with monthly and ends before ovulation, its duration is more individual and determines the length of the entire cycle.
So, the analysis for progesterone is given for the detectionhormonal disorders. Its lack can cause infertility and miscarriage. The level of progesterone varies throughout the cycle, in the follicular phase it is low, and in luteal it increases more than 10 times, which is a sign of ovulation. In different trimesters of pregnancy, its concentration is also different.