Potential due date

based on a few calendars to determine due date, I got the same date of December 7th as the due date for a 5 day embryo transfer. This calculator determined it to be December 6th. Of course, I will not state this as the official due date - that can be determined later by the doctor. IF there are twins, it may be likely that they are born a bit early. Maybe the parents will have a Happy Thanksgiving! :)