When ultrasound was used instead of certain LMP, the number of postterm pregnancies decreased from I just saw this post I'm due on 20 th of March also smile. Huggies Forum Forum Help. Oldest Newest 14 Posts. I was a mess!!!
The duration of pregnancy from the scan to the day of spontaneous delivery was predicted by crown-rump length, biparietal diameter BPDand femur length FL using linear regression models, and the results were compared with estimates based on LMP.
Predicting delivery date by ultrasound and last menstrual period in early gestation.
The earlier the scan the more accurate the due date as they go by the baby's measurements. Courtneyxclark New Zealand Total posts: This information is vital for timing of appropriate obstetric care; scheduling and interpretation of certain antepartum tests; determining the appropriateness of fetal growth; and designing interventions to prevent preterm births, postterm births, and related morbidities. Because of the risk of redating a small fetus that may be growth restricted, management decisions based on third-trimester ultrasonography alone are especially problematic; therefore, decisions need to be guided by careful consideration of the entire clinical picture and may require close surveillance, including repeat ultrasonography, to ensure appropriate interval growth. Measurements of the CRL are more accurate the earlier in the first trimester that ultrasonography is performed 11, 15— Mean sac diameter measurements are not recommended for estimating the due date. You can calculate your due date by subtracting three months from the first day of your last menstrual period LMP and then add a week.