Dr. Jay Jackson, a board-certified obstetrician in Maryland, makes this suggestion: "Think of your EDD as the very center of the ring in a bull's eye that includes a circle of days, two weeks plus and two weeks minus the official 280th day of pregnancy. All the dates in this center ring are really a month of equally fine due days." This means, really, that what you have is a due month. Ouch! Not comforting, we know - but, truly, it's good to keep your due date expectations as realistic as possible.