BRAZILIAN MOM, 19, HAD TWINS BY TWO DADS IN RARE CASE
A Brazilian woman had twins with different dads after having sex with two men on the same day, and DNA tests proved it.
The woman, 19, lived in Mineiros, in southwestern Goiás, Brazil. Her case came to light on September 6, 2022, when G1 reported that her baby boys had different biological fathers. The New York Post and other outlets picked up the story soon after.
“We did the DNA tests and discovered that the father who was present at the test was only the father of one of the children. That night, I had sex with two different men and became pregnant by both of them,” she said in an interview with Spanish TV channel Antena 3, Mirror reported.
How the twist came out
The twins were about eight months old when she asked for a paternity test with the man she believed was their father.
The result showed he was the biological father of only one boy. A test involving the second man confirmed he was the father of the other.
She told G1 she did not know this could happen. She told Mirror she was surprised by the results and “never imagined this could happen.”
What the doctor said
The condition is called heteropaternal superfecundation. It happens when two eggs from the same mother are fertilized by sperm from different men.
Dr. Túlio Jorge Franco, who followed the pregnancy, said the twins share their mother’s genetic material but grew in separate placentas.
Franco called the case extremely rare, putting the odds at “one in a million.” He told G1 he never imagined he would see one in his lifetime, and he considered it the 20th recorded worldwide.
The pregnancy went smoothly, according to the doctor. G1 reported there were no complications and both boys were born healthy.
Prenatal care did pick up a small size difference between the twins, Correio Braziliense reported, though it was not considered significant. The mother told Mirror the boys look very similar.
What happened next
G1 reported the boys were one year and four months old when it published its story.
Metro reported that one of the men is listed as the children’s father and has supported the mother. The New York Post reported that one father cared for the twins and that it was unclear whether the other was involved.
The pregnancy was followed by Franco and medical students at the medical school where he teaches. G1’s page, updated on October 1, 2026, still describes the twins as healthy. It says Franco and his students are studying the case, and one student has been assigned to write a scientific article.
