As we all know, when confirming pregnancy at the beginning, pregnant women go to the pharmacy to buy a pregnancy test stick to test whether they are pregnant, and the HCG value in urine is measured. After the pregnant woman goes to the hospital, the HCG value in blood is tested. This shows how important the role of HCG is during pregnancy. Therefore, HCG is not fixed. What is the normal HCG value at 40 days of pregnancy?
Normal HCG value at 40 days of pregnancy
The normal value of hCG in blood is 10 μ g/L, and the normal value of β - hCG is 3.1 μ g/L. β - hCG is a part of hCG. Generally, the radioimmunoassay value of β - hCG in normal women is less than 3.1. If it exceeds 5, pregnancy may be considered. If it exceeds 10, pregnancy is basically confirmed.
The absolute value of serum hCG varies greatly at different stages of pregnancy and among different pregnant women, and there is no comparability between them, only self comparison can be made. During the first three months of pregnancy, hCG levels approximately double every 2.2 ± 0.5 days.
HCG levels can rise to over 2500IU/L between 35-50 days after pregnancy, and if they are lower than this value, there may be a risk of threatened miscarriage.
HCG value changes over time
Human chorionic gonadotropin enters the maternal blood after fertilization and rapidly proliferates until the 8th week of pregnancy, then slowly decreases in concentration until the 18th to 20th week, and then remains stable. Generally, a complete increase in human chorionic gonadotropin levels to at least 2.5 MoM is associated with Down syndrome. However, the average level of intact human chorionic gonadotropin in the maternal blood of DS patients is only 1.3 MoM, which cannot clearly distinguish DS patients. The human chorionic gonadotropin related molecules used for DS examination include free b-hCG and high glucose hCG (H-hCG).
The levels of human chorionic gonadotropin related molecules are also related to fetal gender, with female infants having significantly higher levels of human chorionic gonadotropin than male infants.
The complete human chorionic gonadotropin is produced entirely by the syncytiotrophoblast layer of the placental chorion. Human chorionic gonadotropin is produced by transitional cells and syncytial cells in the trophoblast layer. Human chorionic gonadotropin begins to be secreted 10-14 days after conception.
After the introduction of the above content, I believe everyone should have some understanding of the normal value of HCG at 40 days of pregnancy. Pregnant women are a great thing and also good news for their families. After knowing that they are pregnant, pregnant women should have regular prenatal check ups in the future and supplement their nutrition in daily life to have a healthy child.
