Despite being born in a single delivery, the baby twins have two different fathers.
The teenage mother, whose name is unknown, recently welcomed two baby boys into the world. The presumed father took a DNA test and it turned out it was positive, however, only for one of the babies.
The phenomenon called heteroparental superfecundation is rare, but not impossible. The woman explained to local media that she had previously been together intimately with two different men on the same day.
"I remembered that I had had sex with another man and called him to take the test, which was positive," she shared.
The mother was surprised about the DNA test result not only because she, like many of us, did not know this situation could happen. She also noticed that the two baby boys were very alike.
It is the 20th case of heteroparental superfecundation that has been registered across the world. The 19-year-old mother is from Mineiros in Brazil.
The babies are now 16 months old and healthy. The pregnancy and birth happened without any complications.
One of the fathers is taking care of the babies together with their mother and it is his name that stands on the birth certificate for both boys.
"He takes care of both of them, helps me a lot, and gives them all the necessary support that they need," the young mom said about the father.
The expert and doctor involved in the pregnancy, Tulio Jorge Franco, explained how a pregnancy like this can happen.
"It is possible to happen when two eggs from the same mother are fertilized by different men."
For this to occur, the woman's body must release a second egg during the same menstrual cycle, and there must be two different sexual partners during the same period.
"The babies share the mother's genetic material, but they grow in different placentas," the doctor explained.
"It's extremely rare. It happens once in a million. I never imagined that I would see a case like this in my life."