Also, I wonder. . . if Abigail is really pregnant, what would be the point of the doctor (even Stefano's doctor) telling her she wasn't? It's not like she isn't going to know for sure that she IS pregnant eventually anyway, and besides, why would Stefano put his own grand-fetus' health at risk by allowing the chance that Abigail won't start taking the usual pregnancy cautions now (stop drinking, pre-natal vitamins, etc.) because she thinks there's no need to, cause she thinks she's not pregnant?
And besides, EJ would never allow one of his children to get away from him, so if the doctor had told Abigail that she IS pregnant, that would have practically insured that EJ (and indirectly Stefano) would have some control of the baby. Is Stefano trying to pull a DOUBLE SCHEME AGAINST BOTH ABIGAIL AND EJ? Wow! That would be amazingly dastardly, even for Stefano!