What does the prenatal fetal sex study in maternal blood consist of?
When a prenatal fetal sex test is performed, the sex of the baby is determined. It is performed during the first trimester of pregnancy and by analyzing a blood sample from the mother. The DNA of the fetus is extracted from it and analyzed to determine its sex.
About 3.4% of the total DNA found in the mother’s plasma is that of the fetus. It increases in the maternal blood during pregnancy and, after delivery, disappears from the mother’s bloodstream.
This prenatal fetal sex study in maternal blood uses the RT-PCR (reverse transcriptase polymerase chain reaction) technique to obtain DNA sequences that indicate the sex of the baby. This test can be performed on any pregnant woman from the tenth week onwards. As this test is performed on a sample of maternal blood, it does not pose any risk to either the mother or the baby.
When are the results obtained?
The results of the study are available within 7 days of the blood draw.
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