A one-year-old girl from Erode was found seemingly 'pregnant' due to a condition called fetus-in-fetu. The fetus pressed on her abdominal organs, stunted her growth, drew blood supply and nutrition. Just 30-40 cases of F in F so far across globe as per literature search of reported cases. There are many theories of how these cases occur. "It usually occurs when the embryo splits too late after fertilization.
When it occurs within the first four days, they become twins. But, when it split after 14 days, it turns out to be a case of conjoined twins of fetus-in-fetu. There is also the parasitic twin theory where very early in a monozygotic twin pregnancy, in which both fetuses share a common placenta, one wrapping around and enveloping the other. In the teratoma theory, the totipotent stem cells, with the power to turn into any cell in the human body, settle down in an abnormal place like…
