Oh OK....I just didn't know what to think. It kind of suck because I'm not 31 weeks technically. :-( plus I went to my Wic appointment today and the first edd I got was Feb 11, then Feb 15 and now Feb 17... So confusing lol.
The one that they are giving you.. maybe baby is just a bit bigger in ultrasound which is just abb estimate.. Go by your last menstrual cycle
My Dr said that he always goes by the original due date (based on your lmp). He said it can change so much because of growth spurts and so many other things that the original date is the most reliable. I know when you get super close like you are you want things to progress more quickly, but the best thing is to go by your original date. Otherwise you'll probably find yourself going crazy thinking you've gone over and wondering if you'll ever actually have your baby. Lol. Good luck.
Your far along so its normal for baby to measure bigger. My Dr goes by my first ultrasound she doesn't change my due date. And its only a two week difference so I wouldn't stress over it. I'd go by ur first ultrasound due date.
I'd go off the 9 week u/s. Baby's go through growth spurts so even if you're measuring ahead, developmentally baby is at the 30-31 week mark.