Can somebody help me understand this. I got this ultrasound February 4th. To me it looks like my due date would be September 9th. It looks like they averaged the GS and CRL measurements. This is the date I've been telling people. At my last appointment my doctor said she had me down as a September 14th due date. Upon further investigation she found her notes from the appoint on the 4th had my due date as 9/9 but in the rest of her notes she had my due date at 9/14. She said it should be the 14th, she's not sure why I was given the 9th at first because you just go by the CRL not both. If this is true then why does my ultrasound show the AUA as 8w6d, with EDD 9/9/16?? Did somebody just mess up somehow? Should I go by the 9th or the 14th as my due date?