My lmp started Aug 18 and my due date is May 24 so your dates make sense to me. It was confirmed by early u/s, and it agrees w/ cycle symptoms we were tracking. How late was your ultrasound performed? If it was after the first trimester (or even late first trimester), they can readily be off by a week since babies start differentiating in growth after early pregnancy. The other thing is that not every woman ovulates 14 days after the first day of her cycle (most don't, in fact)... you may have ovulated a few days later, and coupled with a later u/s, that would readily account for the week difference.
Due dates can be off by several weeks...so off by just one week is no big deal. I know it can be confusing, but that's why 37-42 weeks is considered full term..due 2 the fact that it's really hard 2 calculate actual due dates
Note I'm 37 weeks according to there date but to my lmp I'm actually 38 weeks. And I also found out I was pregnant in sept
That means my period started 9/2/2011. But I didn't have a period in sept in fact my b day its the first of sept and I partied the second. My period ended on my b day. Has any one I've this problem