Meet the baby who was born pregnant.

According to a new study on the infant’s situation, a baby born in Hong Kong was pregnant with her own siblings at the time of her birth.

The baby’s disease, called fetus-in-fetu, is extremely rare, occurring in only one out of every 500,000 births. It’s not entirely clear why this occurs.

“There are disagreements about what these things are… due to the limited cases, there isn’t enough hard scientific data to prove either one.

To gain a more scientific understanding, you’ll need a large number of these cases and a lot of observations, according to Dr. Chao.