Methods for Estimating the Due Date. ABSTRACT: Accurate dating of pregnancy is important to improve outcomes and is a research and public health imperative. As soon as data from the last menstrual period, the first accurate ultrasound examination, or both are obtained, the gestational age and the estimated due date (EDD) should be . New charts for ultrasound dating of pregnancy and assessment of fetal growth: longitudinal data from a population-based cohort study. Verburg BO(1). First trimester ultrasounds. If you are unsure of the first day of your last period you will be offered a dating ultrasound The length of your pregnancy. The information should not be construed as dictating an exclusive course ultrasound dating of pregnancy treatment or procedure to be followed. Legal Notices and Disclaimer All information contained in and produced by the MedCalc system is provided for educational purposes only. UK National Screening Committee. In cases where the date of conception is known precisely, such as with in vitro fertilization, the EDD is calculated by adding days to the date of conception. Gestation by CRL is calculated: Home Ultrasound dating of pregnancy Prenatal health Prenatal ultrasound scans. Usually scans for this type of detection are done around 18 to 23 weeks of gestational age called the " anatomy scan ", "anomaly scan," or "level 2 ultrasound". Perhaps the most common such test uses a measurement of the nuchal translucency thickness "NT-test", or " Nuchal Scan ". The corpus luteum will gradually ultrasound dating of pregnancy get smaller as the pregnancy continues. Assess the size of your baby. Your bladder should not be so full that it causes pain. Views Read Edit View history.

Ultrasound Dating Of Pregnancy. Methods for Estimating the Due Date - ACOG