This was only a six pound baby and by our calculations the c-section was done at least a couple of weeks early, as they like to do in Hollywood.
You can't calculate the due date accurately. Nobody can other than ANS. Again we have the problem that she was such a big liar. All calculations are guesswork because of that. So far as I know, a 6 pound baby is considered to be a full term baby in the US when the time of conception is not clear--but again that is just guess work WRT ANS' baby.