A pair of twins in Vietnam has been discovered to have different fathers, after the dissimilarity between the children prompted their parents to take DNA tests. Both the mother and father took DNA tests as it had been feared they may have been given the wrong baby at the hospital.
The tests, carried out by the Ha Noi Centre for Genetic Analysis and Technology, proved that the twins both belonged to the mother. The children, from the northern Hoa Binh province, are two-years-old and distinctive by one having thick, wavy hair, while the other has thin, straight hair. The 34-year-old husband was found to be the father of only one of the twins, making the children bipaternal.
Dr Keith Eddleman, director of obstetrics at Mount Sinai Hospital in New York told CNN that it is possible for a woman to conceive bipaternal twins through two acts of sexual intercourse.