DNA test shows Vietnam twins had different fathers

HANOI, Vietnam (AP) — A scientist and state media say Vietnam has identified an extremely rare set of bi-paternal twins, or twins with different fathers.

Prof. Le Dinh Luong, president of the Genetic Association of Vietnam, says DNA testing at his Hanoi lab confirmed the twins have different fathers, the first such case that he knows of in Vietnam, with only seven such cases reported in the world as of 2011.