Chimerism

[Trey]

I also watched the show and though it was very interesting, since I have a fraternal twin (opposite sex).

What was fascinating was if the twins eggs are both boys or both girls, no one ever really knows anything is different unless a DNA test is done after they are born and from different body parts. BUT, when the twins are boy/ girl and the eggs merge, the child is born with all sorts of anomilies, mainy of which they are hermaphrodite, (both male and female genitals) like the baby mentioned above with the line down the center of the belly.