UK Twins Discover Different Fathers Through DNA Test, First Documented Case
Fast facts
- Category: Science
- Language: EN
- Published: 2026-05-02 01:00 UTC
- Sources: The Guardian Science
DNA testing revealed that 49‑year‑old twins Lavinia and Michelle Osbourne, who have shared a birthday their whole lives, have different biological fathers – a phenomenon known as heteropaternal superfecundation. The finding, uncovered after the sisters took a commercial DNA test, is the first confirmed instance in the United Kingdom. The twins say the result has reshaped their sense of family and sparked public interest in rare reproductive anomalies.