During pregnancy, the gender of the fetus is one of the most curious things for expectant fathers and mothers. However, in China, it is not allowed to check the gender of the fetus in advance, and hospitals are not allowed to do so for pregnant women. However, some people may use Down syndrome screening to determine fetal gender, so let's take a look at how Down syndrome screening determines fetal gender.
Tang screening examination is the abbreviation for prenatal screening examination for Down syndrome. Down syndrome, also known as Trisomy 21 syndrome or Down syndrome, is the most common chromosomal aneuploidy disorder in which a patient has an extra 21st chromosome compared to normal individuals. The general method is to extract maternal serum, detect the concentrations of alpha fetoprotein, chorionic gonadotropin, and free estriol in maternal serum, and calculate the risk factor of giving birth to a congenital defect fetus by combining the pregnant woman's due date, weight, age, and gestational age at the time of blood collection.
Now let's take a look at how the Down syndrome screening results determine the gender of the fetus. Firstly, let's take a look at the MOM value of b-HCG: below 0.4, the vast majority are boys; 1.0 or above, the vast majority are girls; The remaining range is between 0.4 and 1.0, which is a critical range that is possible for both men and women. Then, by combining the two numerical values (b-HCG and AFp), it is more accurate: the lower the MOM value of b-HCG (0.4) and the higher the MOM value of AFp (1), the more likely it is that it is a boy; The higher the MOM value of b-HCG (0.8) and the lower the MOM value of AFp (1), the more likely it is to be a girl. In addition, both male and female fetuses with Down syndrome and false positive serum have higher b-HCG values and lower AFp values.
Although the results of Down syndrome screening can reveal the gender of the fetus, they may not be 100% accurate and cannot be fully trusted. In fact, both boys and girls are treasures in the family, and in modern society, men and women are equal. The phenomenon of favoring sons over daughters is becoming less and less common, so everyone still adheres to the concept of gender equality.
