Twins found to have different fathers, in UK’s first recorded case
DNA tests showed Michelle and Lavinia Osbourne are half-sisters, a rare case Professor Allan Pacey said he has never encountered in 30 years.
- 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.
24 Articles
24 Articles
Dnevni list Danas
Lavinia and Michelle are the only twins with different fathers in the UK.
Their conception took place naturally – The girls grew up in the same womb, were born to the same mother, but are half-sisters – What is heteropaternal superintendentship
UK Twins Discover They Share Same Mother, Birthday and Womb But Different Fathers
A pair of UK twins who grew up believing they shared the same father have discovered through DNA testing that they are in fact linked to two different biological fathers, according to a report published on WION's official Facebook page. The case has been described by experts as an extremely rare occurrence and is considered one of the first recorded instances of its kind in the United Kingdom. The revelation has drawn renewed public and scientif…
British Michelle and Lavinia Osbourne are twins – but “only” half-sisters.
The two grew up without a father and largely without their biological mother as well. The now 49-year-old sisters had a DNA test done in 2022.
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