Ultrasound accuracy dating
It looks like the dating scans were a month apart but the size actually went down a day?I would go to an actual clinic (like an MFM) that specializes in dating ultrasounds.
Which was correct in the end – the LMP due date or the estimated date of the scan?Before I ot pregnant, I was under a lot of stress with planning my wedding, and my cycly changed the last couple of months from the regular 28 day cycle I used to have. I don't remember accuracy, but I remember that it came earlier than normal.Anyway, when I found I was pregnant, I was imputting the cycle in the computer as if it was still 28 days.The last ultrasound I had was a long one, they measured everything.My due date based off of lmp was 1-11-2011, then the 12 weeks u/s gave me due date of 1-1-2011, 22 wks u/s(gender) gave new due date of , had last u/s @ 32 wks (measuring big) and gave me the due date of , my dr said that we will keep the due date of 12-28, but it seems like everytime they check it changes about a week, but I also don't know the exact date I had my lmp Hi I was also in a similar situation, because I initially was going by my last lmp, but we all know that not everyone's cycle is always on the dot, and we may ovulate differently.Selector .selector_input_interaction .selector_input. Selector .selector_input_interaction .selector_spinner. Ultrasound has become so helpful that obstetricians now refer to the time before it was used routinely as “the olden days.” We use it to diagnose twins early on; we use it to document appropriate growth as the pregnancy progresses; we use it to determine fetal health; and we use it to guide conversion of breech to vertex (head-first) position and to guide amniocentesis.
Most dating scans are done with a trans-abdominal transducer and a fullish bladder.
Data collected for all pregnant women referred to the Maternity & Children’s Hospital in Jeddah.
Only women with single live fetus were included in this study.
From collected data, it was found that out of 53 (100%) patients, 44 (84.62%) pregnant woman have different gestational age from US and last menstrual period (LMP).
From this study we can conclude that the main method to follow fetus growth in third trimester not biparietal diameter (BPD) measurement only.
In general, the earliest scans are more accurate than dating scans performed later in pregnancy…