Fetal sexing is a test that aims to identify the sex of the baby from the eighth week of gestation by means of maternal blood analysis, which checks for the presence of the Y chromosome, present in the male sex.
This test can be done from the 8th week of pregnancy, but the more weeks of pregnancy you have, the greater the certainty of the outcome. To perform this test, the pregnant woman does not need medical advice and must not be fasting, it is even important that she is well fed and hydrated so that she does not get sick at the time of the sample.
- The fetal sex test is performed by analyzing a small sample of blood drawn from the woman.
- Which is then sent to the laboratory for analysis.
- The laboratory evaluates fetal DNA fragments in the mother’s blood and research is carried out using molecular techniques.
- PcR.
- For example.
- To identify the presence or absence of the SYR region.
- Which is the region that contains the Y chromosome.
- Which is present in children.
It is recommended that the test be done from the 8th week of gestation to be more certain of the outcome, however, women who have had a bone marrow transplant or a blood transfusion with a male donor should not perform fetal sexing, so it may be false.
The price of fetal sex varies depending on the lab where the test is performed and if there is an urgent need to have the test result, being more expensive in these situations The exam is not available on the public network or covered by health plans and costs between R$200 and R$500.
The fetal sex test result takes about 10 days to publish, but if requested urgently, the result can be published in 3 days.
The purpose of the test is to identify the presence or absence of the SYR region, which is the region that contains the Y chromosome.Therefore, the two possible test results are:
In the case of twin pregnancies, if the result is negative for the Y chromosome, the mother will know that she is only pregnant with girls, but if the result is positive for the Y chromosome, it indicates that there are at least 1 child.but that doesn’t mean the other baby is, too.