We report on a pair of normally conceived monochorionic/dizygotic (MC/DZ) sex discordant twins. The comparison of blood and skin genotypes revealed that the chimerism was also present in the skin. We conjecture about the developmental origins of this case.
Keywords: chimerism; monochorionic/dizygotic twin pregnancy; spontaneously conceived MC/DZ twins; twin-twin transfusion syndrome.
© 2015 Wiley Periodicals, Inc.