New Born Baby Found Pregnant With Twins At The Point Of Delivery 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." But the doctors who treated the baby girl wrote that rather than a teratoma, the tiny fetuses may instead be the remains of sibling twins that were absorbed during the pregnancy. Missed in check-up The newborn baby was referred to Dr. Yu Kai-man, an obstetrician and gynecologist at Queen Elizabeth Hospital in Hong Kong, because the baby was suspected to have a tumor, accordin...