Is the method of identifying the gender of the fetus accurate?

It can be said that the idea of ????preferring boys over girls has been produced since the emergence of human beings. Boys are strong and can do a lot of work, but girls are weak and will drag others down. However, with the development of the times, these ideas have become backward. Nowadays, more and more people want to have girls. Because of these desires for a boy or girl, there are many ways to identify the gender of the fetus online. So, is the method of identifying the gender of the fetus accurate? Is the method of identifying the gender of the fetus accurate?

On the Internet, there are many methods of identifying the gender of the fetus, including traditional methods and scientific methods. However, the more scientific method is DNA gender identification. It is true that the gender of the fetus can be known by drawing blood. Genetic engineering technology is used to collect blood from the maternal veins to determine the gender of the fetus. There is no risk to the fetus or mother. Due to the report filed by the blood DNA laboratory, the test reliability is about 99. The gender is inferred through chromosomes, especially for male babies, the reaction is positive. The principle of DNA blood gender identification: A gene called "SRY" only exists on the Y chromosome. Once its presence is detected, it means that the fetus is male, so whether the fetal DNA in the mother's blood is isolated Once the SRY gene is detected, the gender question will naturally be solved. Unlike B-ultrasound, which has to wait until the fetus is large enough to observe gender characteristics, this examination method can be performed 8 weeks after conception, and its accuracy is higher than B-ultrasound, reaching 98%. Of course, not all pregnant women can achieve such a high accuracy in predicting the gender of their fetus through blood drawing. Pregnant women must meet the following four conditions to ensure that the accuracy can reach as high as 98: First, the gestational age must be more than 7 weeks, and there must be Please indicate "more than 7 weeks pregnant" or the embryo diameter will be more than 10MM. Second, no male fetus has been delivered within a year. Third, no blood transfusion, major surgery, or organ transplant has been performed within half a year. Fourth, the blood types are the common popular blood types, type A, type B, type AB, and type 0. At present, this technology has been legalized in Hong Kong and is not allowed in China for the time being. Is Nainang’s gender accurate?

Regarding B-ultrasound and fetal gender, there are two common legends nowadays: First, B-ultrasound can observe the fetal genitals, and if you see a "small penis", it is a boy. , the one who can’t see the “small penis” is a girl. Second, according to the data on the B-ultrasound, the gestational sac is elongated in the case of a boy, and the gestational sac is round in the case of a girl. So, are these rumors really credible? Regarding this issue, experts say this: B-ultrasound to detect fetal gender - it is feasible. But it is not 100% accurate. If you have the opportunity to walk into the B-ultrasound room of any hospital, you will see a slogan like this posted on the wall in a prominent position: Fetal gender identification that is not required for medical diagnosis is prohibited. It can be seen that it is true that B-ultrasound can detect the gender of the fetus. But it should be noted that predicting the gender of the fetus through B-ultrasound is not 100% accurate. Before 10 weeks of pregnancy - it cannot be measured at all. Although the gender of the fetus is determined by genes when a woman is pregnant. However, at the very beginning of fetal development, men and women are the same. At the very beginning, the left and right embryos have a small bud or raised genitalia. Only around 7 weeks of pregnancy will the small buds or bulges develop to form the penis, scrotum or clitoris, and labia. However, at this time, B-ultrasound still cannot really tell the gender of the fetus. Because the development of the fetus is a step-by-step process that takes time, it cannot be done in one step.