A Colombian woman has given birth to a baby whose abdomen contained the tiny, half-formed — but still growing — body of her own twin sister. This type of birth, an example of “fetus-in-fetu,” is very rare but not unprecedented. [Like the Science Times page on Facebook. | Sign up for the Science Times newsletter.] The latest case was even more unusual, because doctors clearly identified the fetus-in-fetu during the pregnancy, said Dr. Miguel Parra-Saavedra, a high-risk pregnancy specialist in Baranquilla, Colombia, who oversaw the birth.

Source: New York Times March 20, 2019 20:45 UTC