Pregnancy initially causes a woman a lot of important issues, starting with determining the truth of the fact of fertilization to the moral and financial aspects of the future of her child. If there are suspicions or suppositions possible pregnancy, based on the condition of women, the data should be stated reliably. To do this, an analysis of HCG for 3 weeks of pregnancy, it is used for laboratory confirmation of the fact of conception.
Effect of pregnancy on hormone levels
HCG, or human chorionic gonadotropin, controls the hormonal processes in the body of a pregnant woman. He produced a fertilized egg cell and stimulates the growth of the placenta. Also, this hormone is produced in cancer, and the level measured in the diagnosis of cancer.
fertilization fact raises levels of hCG. 3 weeks after conception, such an increase can only be determined in the blood of women. To do this blood test to determine the level of hCG.
Indicator hormone at first doubles every 2-3 days. On its concentration in the blood reaches the third week of diagnosable level, and then the pace is slowing.
Tests to determine pregnancy have the same principle of action, but diagnosed liquid urine acts, and the level of concentration of the hormone in it increases much more slowly. Therefore, the test to determine precisely the fact of pregnancy later, after a delay, and the occurrence of significant external signs.
How to determine the level of
Indicator hormone in blood is determined by special laboratory tests.
HCG is composed of alpha and beta units. In the calculation of the analysis takes only beta indicators t.k.ih level is crucial.
The study also shows how to develop a pregnancy, which she estimated time and number of embryos that affect growth hormone proportionally.
In laboratory tests carried out 2 research on HCG: HCG total and free beta-hCG. They have different goals and specificity.
Total hormone used to determine pregnancy, beta-hCG - for detection of tumors. And at the same time they are included in the screening of the different trimesters of pregnancy.
The study carried out an analysis of venous blood in the morning on an empty stomach. The last meal is recommended to perform 10 hours before blood sampling
If the patient is taking any medication, it is must announce before the laboratory test.
To clarify the period of conception, analysis should be carried out after 3-4 days delay menstruation, and then repeat the test after 2 days to refine the results.
Norm 3 weeks pregnant
For different patients hCG rate differs. For men and nonpregnant women in its normal level is from 0 to 5.
If this woman who was fertilization rate has week intervals in terms of: the 20-150 mU / ml at week 1, 2 and 3 - 100-4870 mU / ml, and then - from 2500 and above.
HCG index 3 weeks from conception believe diagnosed hormone levels.
According to the study results should not be assumed period, which took place from conception, since indicator has a large scale of the normative values. Consequently, the same level in different women can meet other periods of pregnancy.
hormone index in pregnant women is high. This may signal a few causes: multiple pregnancy, diabetes, fetal chromosomal abnormalities, early preeclampsia and toxemia and other pathologies.
Decreased levels may be due to an ectopic pregnancy or interrupted, placental insufficiency and other pathologies.
This figure assumes treatment to a specialist for diagnosis.
Only a specialist can decipher the results of clinical analyzes, and define them.
false figures
Although the analysis is the most accurate way to determine the conception of fact, it sometimes happens that the figures do not correspond to reality. The reason may be the human factor, ie laboratory error or by the patient.
Statistics show that 3% of women tests show a false positive result. The reason for this may be hormonal failure or cancer disease.
It happens, and vice versa: a pregnant woman analysis shows negative figures. This is due to the fact that fertilization has occurred later than it should, or if the pregnancy is ectopic.
