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Twins found to have different fathers, in UK’s first recorded case
The sisters’ DNA tests showed a rare case of heteropaternal superfecundation, and researchers say it is the first documented in Britain.
- On Saturday, May 2, 2026, national media outlets profiled the first legally and scientifically documented case in British history of twins born with different biological fathers.
- London sisters Michelle and Lavinia Osbourne, now 49, discovered they are half-siblings through independent DNA tests taken after harboring lifelong doubts about their paternity.
- The rare occurrence is the result of a biological phenomenon known as "heteropaternal superfecundation," which happens when a woman releases two eggs during a single cycle that are then fertilized by two different men in a short window of time.
- The sisters are among fewer than 20 cases of this type ever recorded worldwide, a discovery that was kept secret by their mother, who passed away in 2022 shortly after the test results were finalized.
- The twins shared their journey on the BBC Radio 4 series The Gift, revealing that they have since successfully tracked down and established relationships with their respective biological fathers, Arthur and Alex.
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Coverage Details
Total News Sources5
Leaning Left1Leaning Right1Center3Last UpdatedBias Distribution60% Center
Bias Distribution
- 60% of the sources are Center
60% Center
L 20%
C 60%
R 20%
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