Non-invasive DNA test for child gender
Non-invasive DNA testing refers to measuring the characteristics of a certain DNA fragment on the chromosome through cell fragments in the human body such as blood and saliva to determine the genetic type of the individual and obtain relevant information. Non-invasive DNA test for child gender is one of the applications. This article will explain it in detail from four aspects: detection principle, sample collection, data interpretation and precautions.
1. Detection principle
Non-invasive DNA testing of a child\’s gender mainly relies on free fetal DNA in plasma, and detects the SRY gene in it through PCR and chip technology to determine the gender of the fetus. The SRY gene is a sex-determining gene located on the Y chromosome. Only male fetuses will carry this gene. Therefore, by detecting the SRY gene in plasma, the gender of the fetus can be identified very accurately.
2. Sample collection
Non-invasive DNA testing of a child\’s gender requires the collection of maternal plasma samples, usually after 7 weeks of pregnancy. Pay attention to hygiene and disinfection during the sampling process to avoid bacterial contamination. At the same time, attention should also be paid to the quality of the test samples, especially the content of fetal DNA in the plasma. If the sample is of poor quality, it may lead to inaccurate test results.
3. Data interpretation
The results of non-invasive DNA test for child gender are based on the detection of SRY gene in plasma, and the results are highly accurate. If the test result is a boy, it means that the fetus has a Y chromosome; if the result is a girl, the fetus only carries an X chromosome. In addition, when interpreting data, it is also necessary to pay attention to the reliability of the results. For example, twin or multiple pregnancy, pregnancy combined with abnormal intrauterine environment, etc. may be misjudged.
4. Things to note
Although non-invasive DNA testing of children\’s gender is highly accurate, there are still some issues that need to be paid attention to during use. First of all, due to insufficient pre-pregnancy examination and early pregnancy maintenance, it may lead to a lack of nutrients such as iron and protein, which affects the concentration of fetal DNA in plasma. Secondly, diseases such as gestational diabetes and high blood pressure during pregnancy will affect the health of the fetus and lead to misjudgment of gender. Finally, it is recommended to get the test from a regular hospital to avoid being misled by unreliable institutions.
Summary
Non-invasive DNA testing of children\’s gender is an effective testing method that is accurate, fast, safe, non-invasive, and has clear clinical significance. It has attracted the attention and pursuit of more and more pregnant women. Therefore, during use, you should have some knowledge about it to avoid unnecessary worries and misjudgments.
