Ms. Van Anh and Mr. Ngoc Tuan (28 years old, Hanoi) have been married for many years but have no children. At a class reunion after 5 years of graduating, she met her ex-boyfriend again. Just when she was sad that her husband and her husband would never have children, and that she was suffering from alcohol, she "crossed the line" with her ex-boyfriend.
Not long after, she became pregnant. Worried about whose child the child was, she called the genetic testing center to ask for help.
She was advised by an expert that if she wanted to determine her parentage, she needed to take a venous blood sample from her wife and a DNA sample from her husband, including one of the following samples: Whole blood sample, oral mucosa sample (5-7 cotton swabs). , let it dry for 3-5 minutes, then put it in a clean bag), hair with legs or nails.
While her husband was fast asleep, she secretly took a hair sample with roots to preserve it, then brought it to the testing center. At this time, the fetus in her womb was only 10 weeks old.
The specialist took 7-10 ml of her venous blood, used sequencing technology, analyzed the free DNA of the fetus in the mother's blood, extracted the DNA, multiplied it, then put it into the gene sequencing system, compared it. Compare it with your husband's DNA sample.
Test results showed that the baby in the womb has the same bloodline as her husband. Ms. Van Anh feels like a burden has been lifted, but she also regrets betraying her husband.
Medicine has two methods of fetal DNA testing: invasive and non-invasive. (Illustration)
Colonel Ha Quoc Khanh, senior consultant of a testing company in Hanoi, said that there are two methods of fetal DNA testing: invasive and non-invasive.
Non-invasive fetal DNA testing can be performed as early as the 7th week of pregnancy, with 99,9% accuracy. The fetus's DNA will be determined from the mother's blood sample, then compared with the DNA of the putative father. Results are available in about 10 days.
This method has the advantage of being easy to take samples, minimizing pain because it does not require chorionic villus biopsy or amniocentesis, and is safe for the fetus as well as the mother.
Invasive fetal DNA testing method uses amniotic fluid samples or chorionic villus cells for analysis. With this method, pregnant women need the support of a specialist to ensure the safety of the fetus.
Due to the process of reabsorbing amniotic fluid through the digestive system, skin, umbilical cord and amniotic membrane of the fetus, the amniotic fluid contains fetal DNA cells. When the amniotic fluid is sent to the medical facility, a technician will extract the child's DNA for analysis. The appropriate time for amniocentesis is weeks 16 to 22 of pregnancy.
“Any amniocentesis test requires a doctor's consultation because this method has many potential risks. Time to receive results for invasive DNA testing ranges from 4 hours to 3 days. Experts recommend.
DNA testing is the analysis of individual DNA samples to find each person's genetic data. From there, compare and determine whether the individuals in question have a real blood relationship with each other.
DNA testing is not only personally meaningful in identifying relatives and blood relatives. This job also helps fulfill the rights and obligations of an individual or organization, such as DNA testing for naturalization, visas, DNA testing for birth certificates, determining custody rights and benefits for children. children, DNA testing to exercise property division and inheritance rights.
