The mother, called T.M. in court documents, named her former partner, A.S., as the father of both girls in the October case to establish paternity. But a DNA test only linked him to one child.
A.S. owes $28 per week in child support, which will only cover the twin he fathered, Passaic County Superior Court Judge Sohail Mohammed ruled, the Associated Press reported.
So how does this happen? T.M. gave birth to twins in January 2013 after having sex with two men in the same week, she said in Passaic County Superior Court testimony.
T.M. likely ovulated twice in in the same 48- to 72-hour period, and then each egg was fertilized by sperm from a different man, Karl-Hans Wurzinger of LabCorp reportedly told the court. The result is bipaternal twins.
It's a rare situation — Mohammed found just two other court cases involving bipaternal twins — but the odds are now increasing, in a child support case, The Record reported.
"It is not unreasonable to expect that when one is confronted with the DNA test results that show each twin in a given case has a different father, an overwhelming majority will likely express sheer disbelief," he wrote.