A baby born in Hong Kong was pregnant with her own siblings at the time of her birth, according to a new report of the infant’s case.
The baby’s condition, known as fetus-in-fetu, is incredibly rare, occurring in only about 1 in every 500,000 births. It’s not clear exactly why it happens.
“Weird things happen early, early in the pregnancy that we just don’t understand,” said Dr. Draion Burch, an obstetrician and gynecologist in Pittsburgh, who goes by Dr. Drai. “This is one of those medical mysteries.”