What are the changing rules and influencing factors of hcg in test tube infants?

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Changes of HCG value in test tube infants

IVF refers to the embryos that are fertilized in the laboratory and cultured outside the eggs and then implanted into the mother's uterus through assisted reproductive technology (ART). In the process of IVF, human chorionic gonadotropin (HCG) is an important indicator to judge whether the pregnancy is successful or not. The change rule of HCG value is of great significance for judging embryo health and predicting pregnancy results.

HCG value change rule

In the process of IVF, the change of HCG value can be divided into the following stages.

Stage 1: HCG produced by ovary after embryo implantation

From 6 to 10 days after embryo implantation, HCG began to be produced by the ovary, and its level gradually increased. This stage is the earliest stage of HCG. After the fertilized egg is successfully implanted, the ovary begins to produce HCG, but the HCG level cannot be detected at this time.

Stage 2: HCG produced by embryo

About 10 days after embryo implantation, HCG begins to be produced by the embryo itself. At this stage, the chorion in the embryo began to secrete HCG, and its level gradually increased. HCG levels in normal pregnancy can usually be detected at this stage.

Stage 3: Rapid increase of HCG level

HCG levels began to increase rapidly 10 to 14 days after embryo implantation. The HCG level in this stage increases rapidly, and the HCG level in normal pregnancy can usually double in this stage. The increase of HCG level indicates that the embryo develops well.

Stage 4: Stable rise of HCG level

After 14 days of embryo implantation, HCG levels began to rise steadily. At this stage, the HCG level continued to rise, but the growth rate was relatively slow. When the embryo develops well, the level of HCG will gradually approach the level of normal pregnancy.

Influencing factors of HCG value change

The change of HCG value is affected by many factors. The following are the main factors affecting the change of HCG value:

Embryo development

The development of embryo is one of the important factors that affect the change of HCG value. If the embryo development is abnormal or there are chromosomal abnormalities and other problems, the change of HCG value may be abnormal or stagnant.

Embryo implantation position

The position of embryo implantation also has some influence on the change of HCG value. If the embryo implantation position is abnormal, such as ectopic pregnancy, the HCG value may be lower than expected or cannot rise normally.

Maternal constitution and health status

Maternal constitution and health status also have a certain impact on the change of HCG value. Some chronic diseases, endocrine problems or poor physical conditions may lead to abnormal changes in HCG values.

summary

The change rule of HCG value is one of the important evaluation indicators in the process of IVF. The observation of HCG value can judge the development of embryos and predict pregnancy results. The changes of HCG value are mainly divided into HCG produced after embryo implantation and HCG produced by the embryo itself, and the HCG value will gradually increase over time. The development status of embryo, implantation position, maternal constitution and health status will affect the change of HCG value. In the process of IVF, it is very important to monitor and evaluate the changes of HCG value in time to ensure the health of embryos and the success of pregnancy.