Many women who are already pregnant know that if they are pregnant with a
pregnancy test, the presence of two bars is pregnancy, but many people do not
know why there are two bars, and the principle of urine detection of pregnancy.
In fact, the main indicator is increased serum human chorionic gonadotropin, or
HCG, produced by the placenta, which starts around 10 days after conception.
The term serum human chorionic gonadotropin may be unfamiliar because it is
a specific dynamic indicator for women during pregnancy. The level of human
chorionic gonadotropin (HCG) is the basis for accurately determining whether or
not to become pregnant in the early stages. It will gradually decrease after 8
weeks of pregnancy, so the serum HCG test is very important.
Is the relationship between human chorionic gonadotropin and pregnancy:
women of reproductive age in the fertilized egg moves to uterine cavity after
implantation, which is pregnant, the formation of embryo, in the process of
growth for developing fetus and placenta form-fitting trophoblastic cells will
produce a large number of human chorionic gonadotropin (HCG), which can be
pregnant women blood circulation and excretion in the urine. Serum and urinary
HCG levels rise rapidly from 1 week to 8 weeks of gestation, peak at 8 weeks of
gestation, and then slowly decline to moderate levels until the end of
gestation. Therefore, changes in the HCG index can be determined by serum test
and urine test, so that pregnancy can be accurately determined.
But there are many exceptions to this test. The usual rise in HCG may not
be a sign of pregnancy, but may also be a sign of illness. Incomplete abortion
can lead to increased HCG concentrations. Firstly, the misoperation of the early
pregnancy test may lead to the failure of the test. Secondly, the HCG
concentration in the blood of patients with hydatidiform mole and
choriocarcinoma also increases significantly. Men with spermatogonial testicular
cancer also have moderately elevated levels of HCG in their blood. The detection
of HCG in some patients with threatened abortion can not only understand the
secretion function of placental trophoblast cells in advance, but also provide a
basis for clinical treatment. Levels of HCG in the blood can be reduced in cases
of spontaneous abortion, fetal malformation, and fetal growth restriction.
So the serum human chorionic gonadotropin test can be used to determine
whether a woman is pregnant or not and some major diseases. People who are
accurately pregnant need to know more about the HCG test, avoid nervousness
during the hospital examination, and the girlfriend who USES the pregnancy test
in advance should also be properly handled to ensure the test results are
accurate. If abnormal should go to normal hospital in time to check.