In 2018, a Colombian woman had a paternity test done on twins and discovered that each child had a different father. The laboratory at the National University of Colombia confirmed the case of heteropaternal superfecundation, a very rare phenomenon.
Heteropaternal superfecundation is an extremely rare phenomenon where twins are born with different fathers during the same menstrual cycle. About twenty such cases have been reported in scientific articles worldwide, with only three cases found in a database of 39,000 paternity tests.
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A woman went to the laboratory at the National University of Colombia in 2018 for paternity testing of twins born two years earlier
The phenomenon is known as heteropaternal superfecundation
About 20 similar cases have been reported in the worldwide scientific literature
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The test was performed using microsatellite marker technology, analyzing 17 DNA points from the mother, babies and alleged father
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The alleged father's DNA matched one of the boys, but not the other
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The test was repeated to confirm the result
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For heteropaternal superfecundation to occur, the woman must have two sexual partners within a short time frame, polyovulation must occur and fertilization must happen both times
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