There are two research options - general and beta-hCG. Each of them has its own indications for determination.
General.
It is taken to detect pregnancy in the early stages, when it has not yet reached the level to appear in the urine. This means that the test strip will not show it yet. The hormone grows progressively - per day its concentration increases by 100%. This increase continues until the placenta is formed - by the end of 3 months. Then the need for it decreases, and it gradually decreases. In the 2nd trimester, all pregnant women need a test to check the development of the baby in the uterus.
Free beta.
The hormone consists of two chains of amino acids. The first repeats in structure some of the lutropin, follitropin and thyrotropin of the pituitary gland. They are found in the blood of all people. The second part is that only hCG has a beta chain. Its detection is a sign of disease, but also requires additional examination. This means that a diagnosis is not made based on elevated beta-hCG. The need for research arises when:
• tumors of the reproductive system;
• neoplasms of internal organs;
• the risk of Down syndrome in the fetus;
• suspicion of other chromosomal abnormalities.
Pregnant women over 35 years of age or those with a family history of genetic diseases, those exposed to radiation or toxic substances, or severe viral infections must be tested.