Woman Gives Birth To Twins With Different Dads

Yup, it's possible!

A woman, from Hoa Binh province in Vietnam, was forced to send her now two-year-old children for DNA tests because of 'striking' differences in their appearances.

After running some tests, the Ha Noi Centre for Genetic Analysis and Technology proved the twins shared the same mother but had been fathered by two different men.

President of the Genetic Association of Vietnam, Le Dinh Luong, told AFP that the findings were extremely rare.

"Our Centre for Genetic Analysis and Technology lab has tested and found a pair of bi-paternal twins. This is rare not only for Vietnam, but for the world."

So how does it happen?!

Turns out, a woman's egg has a lifespan of one to two days, whereas a man's sperm can last for a full week.

So if one sperm hangs about for a bit, then another sperm shows up, they can both fertilise two eggs.

Source.