The exceedingly rare phenomenon, dubbed 'fetus in fetu,' has only been recorded about 200 times in medical literature. It's unclear how many of these involved multiple fetuses. The woman ...

This is a case of a 'fetus in fetu', a condition where a parasitic twin develops inside its identical twin. It's characterized by a mass in the abdomen that resembles a fetus. The case has been ...

At the moment of conception, twins begin a lifelong relationship that scientists think might answer some of life’s profound questions. While twinning is generally considered to be a natural and ...

It was 'fetus in fetu,' one of the rarest conditions in the world. We sought a second opinion, and the case was confirmed by ...