A woman has given birth to what may be Vietnam’s first case of bi-paternal twins, or twins with different fathers, scientists in Vietnam have confirmed.
According to the online newspaper Dan Tri, a 34-year-old man from the northern Hòa Bình province in Vietnam took his twins to get DNA testing done after his relatives insisted that they didn’t look the same- one twin had thick, curly hair, while the other had thin, straight hair.
Le Dinh Luong, president of the Genetic Association of Vietnam, said the twin’s parents brought them to the Center for Genetic Analysis and Technologies, in the country’s capital of Hanoi, to have their DNA checked. After the testing was complete, the doctors made a shocking discovery- the twins had the same mother, but different fathers, which made them bi-paternal.
Heteropaternal superfecundation: woman in Vietnam gives birth to twins, each with a different father https://t.co/rsjZjnkf49
— Rowan Hooper (@rowhoop) March 10, 2016
The man was only the father to one of the twins, as the Y-chromosome from the other twin did not match his own. To ensure that there wasn’t a mix-up at the hospital, the lab also tested the mother’s DNA and found that she was in fact the mother to both of the twins, which were born on the same day, and are the same sex.
“This is rare not only for Vietnam, but for the world,” Luong said. “There are only less than 10 known cases of twins with different fathers in the world. There might be other cases but the parents and/or the twins were not aware of it or didn’t want to announce it.”
One of those 10 cases was reported in the United States last year after a New Jersey mother found out that her twins also had different fathers.
According to a previous report by the Inquisitr, Court documents identified the mother as only T.M. and said she delivered the set of twin girls in January 2013. When the woman later applied for child support, she named the father of both the girls as A.S. However, when T.M. revealed that she had had sex with both A.S. and another man within a week of one another, a DNA paternity test was requested.
The DNA test results were delivered in November of 2014 and revealed there was a 99.9 percent chance that each egg was fertilized by a different man during the same menstrual cycle. This marked the first case in New Jersey to feature twins with different fathers and only the third in the United States.
A Vietnamese woman has given birth to a rare set of bi-paternal twins — twins with different fathers https://t.co/xpKNpfPp3C
— New York Post (@nypost) March 10, 2016
Although rare, Dr. Brooke Rossi, an obstetrician and gynecologist at University Hospitals McDonald’s Women’s Hospital in Cleveland, said having twins with different dads is a natural phenomenon. Twins with different fathers are conceived when the mother releases two eggs during her menstrual cycle instead of one, and they are both fertilized within the same month. A woman’s egg has a life span of 12 to 48 hours, and a sperm is viable for seven to 10 days, making heteropaternal superfecundation possible.
“The sperm live in the genital tract for two days,” Rossi explained. “It’s possible a woman can have sex with a man on a Tuesday and have sex with a different man on Wednesday, and it is possible for [her] to get pregnant [with twins].”
[Photo via Shutterstock]
Twins With Different Fathers Born To Woman In Vietnam is an article from: The Inquisitr News
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