Correlation between HCG value and gestational age in test tube infants
IVF means that sperm and eggs are fertilized in vitro and cultured into embryos through assisted reproductive technology (ART), and then transferred into women's uterus to help couples who cannot conceive naturally achieve their reproductive aspirations. In the process of IVF, HCG (human chorionic gonadotropin) is an important indicator, and its value is related to the gestational age.
Change of HCG value
In normal pregnancy, after the fertilized egg is implanted, the embryo will begin to secrete HCG hormone. The presence of HCG hormone maintains the function of corpus luteum, making it continue to secrete progesterone and maintain the stability of pregnancy. The content of HCG will gradually increase until it reaches the peak. Generally, the HCG value will reach the peak from the 10th to the 20th day after fertilization. At this time, most IVF mothers can detect the presence of HCG through blood or urine.
When the gestational age gradually increased, the HCG value gradually decreased. Under normal circumstances, after the HCG peak appears, the hormone level will gradually decline until the end of 13-14 weeks of pregnancy. Therefore, there is a specific relationship between HCG values and gestational weeks.
Association with gestational age
The HCG value of IVF is related to the gestational age. According to medical research, the level of HCG is positively correlated with gestational age. Under normal circumstances, the longer the gestational week, the higher the content of HCG. This is because in the early stage of pregnancy, the embryo grows faster, the cell divides rapidly, and secretes more HCG. With the increase of gestational weeks, the growth rate of the embryo slows down, and the HCG secreted will gradually decrease.
However, it should be noted that the specific standard range of HCG value will vary due to different processes and individual differences of IVF. The evaluation of HCG values in different hospitals and clinical practices may also be different. Therefore, the accurate gestational week cannot be determined only by the HCG value. Doctors also need to evaluate the progress of pregnancy in combination with other indicators and examination results.
clinical application
By monitoring the HCG value of test tube babies, doctors can assess the development of embryos and pregnancy progress. If the HCG value is abnormally high or abnormally low, it may indicate the risk of abnormal embryonic development or pregnancy complications.
For test tube babies in early pregnancy, HCG detection is helpful to accurately confirm pregnancy, predict embryo survival rate, and monitor pregnancy progress. If it is found that the HCG value increases slowly, the doctor may further evaluate the progesterone level or conduct ultrasonic examination to confirm the development of the embryo.
For test tube infants with a later gestational age, the HCG value can be used to assess the health status of pregnancy and whether there are pregnancy complications, such as pregnancy induced hypertension syndrome or pre eclampsia. By monitoring the change of HCG value, doctors can find and deal with these complications in time to ensure the safety of mothers and infants.
Summary
In conclusion, there is a certain correlation between the HCG value of IVF and the gestational age. Generally, the HCG value reaches the peak value 10-20 days after fertilization, and then gradually decreases. The HCG level was positively correlated with the gestational age. The longer the gestational age, the higher the HCG content. By monitoring the HCG value, doctors can assess the development of embryos and pregnancy progress, predict the survival rate of embryos, and timely detect and deal with pregnancy complications to ensure the safety and health of IVF.
