A Chinese man is left stunned after finding out that his twin babies have two fathers.
The parent, who remains unidentified, made the shocking discovery after taking the newborns to undergo a DNA test as part of the standard procedure to register their births in China, a DNA analyst told reporters.
The man was astounded upon receiving the test results which indicated that his wife also had sex with someone other than him, Chinese media report.
Deng Yajun, the practitioner, who produced the paternity report, said that the chance for such case to happen is one in 10 million.
A Chinese man (not the one pictured) is left stunned as he discovered that his infant twins have two fathers, a DNA analyst who conducted the paternity test has revealed. In the file picture above, a father takes a nap with his twins in a shop on August 28, 2006 in Wuhan.
“First, the mother needs to produce two eggs instead of one in the same month [to have twins],” Ms Deng, who is also the director of Beijing Zhongzheng Forensic Identification Centre, explained to China News Weekly.
“Second, she needs to have intercourse with two men in really short space of time to make it possible.
“The results showed that the children have the same mother but not the same father. They have at least two fathers,” Ms Deng suggested.Â
Twins being born with different fathers is an extremely rare occurrence known as heteropaternal superfecundation.
Women usually have to have sex with two different men within a day before or after ovulation for both eggs to be fertilised. 
FILE: A test tube with blood sample for a paternity test+4
Deng Yajun, the practitioner who produced the paternity report, said that the chance for such case to happen is one in 10 million.
Similar stories have been reported in China before as another Chinese mother was forced to admit that she had cheated on her husband in a one-night stand after receiving the DNA results last year.
It came after the couple from south-eastern China’s Xiamen city went to register the birth of their twin sons at the local police station in 2019.
In order to complete the registration, they had to produce the results of a paternity test to prove that the babies were theirs.