A baby being born pregnant sounds like the beginning of a weird sci-fi movie.

However, shockingly, this is something that actually happens.

It’s rare, but there have been close to 200 documented cases of a baby born pregnant.

The most recent case, a baby born pregnant in 2010, was thought to have two tumors in her abdomen.

But after successful surgery at two weeks old, it was determined that the tumors were actually fetuses.

Those fetuses inherently classified the little girl as a rare baby born pregnant. The fetuses she was born with in her abdomen were eight-10 weeks developed.

They even had spines, intestines, bones with bone marrow, “primitive” brain matter, anuses, rib cages, and umbilical cords. One weighed 14.2 grams and the other 9.3 grams.

But, the baby girl wasn’t really technically pregnant with them.

“Since it is impossible for the little girl to have conceived the pregnancy on her own, the fertilization of the twin fetuses, of course, belongs to her parents, which has gone to the wrong place,” Dr. Yu Kai-man told the South China Morning Post.

The condition is called fetus-in-fetu and is apparently almost undetectable in the live baby until after birth.

Dr. Yu said, “It was almost impossible to detect during the prenatal check-up, as the embryo inside the baby was too small.”

The report stated that the reasons for a baby being born pregnant are still unknown.

However, in this case, researchers suspect that it may have something to do with the mother previously having numerous abortions. However, the World Health Organisation has classified fetus-in-fetu as a variant of mature teratoma, a type of cancer.

They say more evidence is needed to prove either theory.

What do you think of the news that a baby could be born pregnant?