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Originally Posted by Canada 02
Very difficult to understand how this is biologically possible. Sounds like a hoax or mis-reported by the Pakistani media. Where is the placenta and umbilical cord for the two fetuses?
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Sounds like the fetus within the other fetus forms its own... I assume this is what happens before birth also.
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It continues to survive as a parasite even past birth by forming an umbilical cord-like structure that leeches its twin's blood supply until it grows so large that it starts to harm the host, at which point doctors usually intervene.
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