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The National University of Colombia announced this week, through an investigation published on its news portal, a strange case in which twins were with different parents.
This is the first case of different paternity in twins to be reported in a national scientific journal. The article was first published in the Biomedical Journal of the National Institute of Health.
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According to the educational institution, after comparing the DNA of the alleged father of the twins, the Population Genetics and Identification Group of the National University of Colombia (UNAL) showed that this coincided with the genetic profile of only one of them, that is, that for the other it was an exclusion of paternity.
This analysis began in August 2018, when the scientific team received a request to establish the paternity of two male twins with genetic markers, from the alleged father, who was suspicious of the children’s relationship and required paternity tests, the University noted. National.
The doctor in Sciences – Biology of the UNAL, Lilián Andrea Casas Vargas, related in the note that when there are very difficult cases or you want to be sure of the result, the Laboratory makes other markers. In this case, they made one known as the “Y chromosome panel,” taking into account that the twins are male.
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In the case, a marker known as “Y chromosome panel” was made, taking into account that the twins are male.
Casas explained in the UNAL statement that it is a tool widely used in parental affiliation tests. “The Y chromosome is secreted only by the paternal line, and it does so en bloc from one generation to another, it never changes.”
In the institution’s report, the geneticist pointed out that as an established procedure in the laboratory, when a case of paternity arrives and this results in exclusion the whole process is repeated to make sure that there have been no technical errorsThis is how the users were called back, other samples were taken, the same procedures were carried out and the case was confirmed, whose report, due to its rarity, was published in the Biomedical Journal of the National Institute of Health.
According to the report of the educational institution, in Colombia, the heteropaternal superfertilization –As the case of twins from different parents is known in a specialized way– is an extremely rare phenomenon that occurs when a second egg, released during the same menstrual cycle, is fertilized by a sperm from a different man in separate sexual relations.
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Markers are a widely used tool in parental parentage tests
The UNAL report also reported that although the Master in Human Genetics María Luisa Judith Bravo Aguiar presented a case of this type in Colombia, it was not published in a scientific journal, and although it is cited as an example in the book The genetic truth of paternity, does not delve into the finding.
The case of the Berney-Edwards twins in the UK:
Although the case reported by UNAL is the first to be published by a Colombian scientific journal, the truth is that other cases have been presented in the world. An example is that of the twins Calder and Alexandra Berney-Edwards who were born in the United Kingdom through a surrogacy.
In February 2019, the portal BBC reported the case of the pair and how the conception of the children was carried out. According to the British network, the children’s parents are Simon and Graeme Berney-Edwards, a homosexual couple from the United Kingdom.
When Simon and Graeme decided to have children, they went to an agency that is responsible for helping parents with in vitro fertilization processes.
Initially, they had the idea that they would first have a child begotten by one of them and later a second child begotten by the other.
However, the agency that helped them indicated that it was possible to have both children at the same time and with the same mother.. After a bit of hesitation, the couple decided to go ahead with this idea, for which they found an anonymous egg donor in the United States.
They traveled to Las Vegas, where the eggs were collected and separated into two groups: half would be fertilized with Simon’s sperm and the other half with Graeme’s.
The resulting fertilized embryos were evaluated and frozen until the moment of implantation in the pregnant mother’s womb.
Once the embryos were implanted, Simon and Graeme followed the pregnancy remotely and arranged to travel to Canada, where the expectant mother resided, about six weeks before the possible date of birth.
“We always said that if we were lucky enough to have one of each it would be enough. We wouldn’t consider having four, but I say never say never again“, Simon told BBC, who revealed that they still have nine frozen embryos.
ELTIEMPO.COM
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