Early transvaginal u/s has a range of about 3 days in either direction.
I had never heard that extra bit of information, although I have heard that the early u/s is the most accurate.
If that is the case, then maybe FF wasn't really "wrong" after all.
FF predicted my EDD to be three days earlier than my early u/s showed. :)I think I heard that the range of 3 days is more often due to ultrasound tech error than anything else, is that true, BTB?
Other ultrasounds at 19, 21, and 27 weeks all gave EDD of 11/12. Totally 6 ultrasounds have all given you the same EDD - 11/12.
Given this information, would it be possible that all of my ultrasounds were a month off and I conceived Jan 18? Based on this EDD, the last date of your period would have been 5th of February.
(not sure of LMP either)My best friend is an u/s tech so I've been in every other week for an u/s (just for fun :) ). said last week that based on my betas I am anywhere from 3-5 weeks pg. I'm hoping to have a better idea after the ultrasound.
When she scanned me at 4w6d, I honestly didn't see anything on the screen, although her trained eye evidently did see something. So I guess it was accurate, even though I couldn't even see what the heck she was measuring. Beta-h CG levels aren't very good at all, as you've found. I've heard 4-5% of babes show up with that kind of punctuality. although at the end of your pregnancy your belly should measure in centimeters equal to the number of weeks you are Not at the end-end. After that some ladies - especially first-time moms - go through the 'lightening' in which the baby drops and the uterine fundus does too.
The American College of Obstetricians and Gynecologists state the following: “Ultrasound measurement of the embryo or fetus in the first trimester (up to and including 13 6/7 weeks gestation) is the most accurate method to establish or confirm gestational age” (Committee Opinion, No. Even though using your last period date (LMP) is a traditional dating method, the accuracy of this practice depends on a regular menstrual cycle of 28 days, with ovulation occurring on the 14th day of the cycle.
Early transvaginal u/s has a range of about 3 days in either direction. If LMP is uncertain I'd happily take a u/s dating for my EDD - with the caveat of course that they are ballpark only - it's a rare babe that's born on the EDD! : DMy OB does the first ultrasound before 10 weeks because he says the earliest ones are the most accurate. My uterus "shrunk" 2 cm in 3 days when my DD dropped.
Apparently, all babies grow at the same pace early on. My son was born 8 weeks early so I have no way of knowing how accurate mine was in reality - although at the end of your pregnancy your belly should measure in centimeters equal to the number of weeks you are, and when I delivered my belly was 32cm. There's lots of other ways to confirm dating - when kicks are first felt, when doppler first picks up the h/b, etc all give very rough clues that a date is or isn't right, but u/s is the most accurate in the absence of accurate dates, and the earlier the u/s, the better it is.
I discovered I was pregnant unexpectedly, and went to have an ultrasound on May 23rd.
Due to having wavering periods, I never really keep track, and therefore I don't know when my last period was.
I had an ultrasound on 4/26 that dated me 11wks, 2d CRL 45mm with EDD 11/12.