Each fetus in her abdomen had a spine, intestines, bones with bone marrow, brain matter, an anus, a rib cage, and an umbilical cord.
The baby was identified with a rare condition known as fetus-in-fetu, which is reportedly known to occur in 1 in every 500,000 births.
Unfortunately, there is not enough information about the cause of this condition.
Dr. Draion Burch, practicing in Pittsburgh, said that certain things happen in the initial stages of pregnancy and they are difficult to understand. This is one of those medical mysteries.
The World Health Organization considers such tiny fetuses as tumor or teratomas rather than normally developing fetuses. However, doctors who treated the baby girl have a different opinion.
Each of the fetuses had an umbilical cord with a placenta-like mass connected to the baby girl's belly. It is more likely that the baby girl may have once been a part of the triplets. At the time of being absorbed into the baby's body, they would have been alive.