Our crown-rump length and gestational age calculator gives you a straightforward answer to your question – enter your CRL measurements into the proper field and await your result; in the format of hours, days, weeks, or mixed!

Enter the CRL and press calculate to obtain the estimated gestational age and expected nuchal translucency thickness. The calculator will also give the percentile for a measured NT if entered for CRL 40 to 85 mm.

2023年4月1日 · Crown Rump Length Chart. The CRL diagram was first presented by Robinson in 1975 and is, still, the primary reference for pregnancy dating as well as evaluation. Below, we provide a CRL chart for your reference.

Crown-rump length (CRL) is the measurement of the length of human embryos and fetuses from the top of the head (crown) to the bottom of the buttocks (rump). It is typically determined from ultrasound imagery and can be used to estimate gestational age. Diagram showing crown-rump length by gestational age.

A critical evaluation of sonar “crown-rump length” measurements. Br J Obstet Gynaecol 1975;82(9):702-710.

In scientific terms, the CRL is the measurement from the top of the fetal head to the area just above where the legs begin, excluding the limbs and yolk sac. This crucial measurement is often captured through ultrasound, typically up until the 14th week of your pregnancy .

Crown-Rump Length (CRL): The measurement of the length of the fetus from the top of its head (crown) to the bottom of its buttocks (rump). This method is considered the most accurate in the first trimester, offering an estimation with a margin of error of 3-5 days.

For dating charts the known variable [crown-rump length (CRL) or head circumference (HC)] is plotted along the horizontal X axis, and the unknown variable gestational age (GA) on the vertical Y axis. Size charts plot the GA on the X axis and the size variable on the Y axis.

2025年2月1日 · A Crown Rump Length (CRL) Calculator helps estimate gestational age based on the measurement of the fetus from the top of the head (crown) to the bottom of the torso (rump). This measurement is commonly used in early pregnancy ultrasounds, typically between 6 and 14 weeks of gestation, to determine the fetal age and expected due date.

2025年3月20日 · Calculate your gestational age and due date accurately with our easy-to-use calculator, utilizing crown-rump length (CRL) and mean sac diameter (MSD) measurements.