On examination, this mass was found to be an incomplete heteropagus twin attached to the anterior abdominal wall. No pulsations were felt in the omphalopagus twin. There are two primary groups of conjoined twins. In one group, the two fetuses are of almost equal size, symmetrically disposed and united by corressponding parts. In another group, the two fetuses are of different sizes, asymmetrically disposed and united by apparently unlike parts.
Heteropagus twins can present with difficult labor depending upon the size.
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