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Fetal dating charts

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From: Kanris
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Added: 05.07.2019
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References Dating the Beginning of Pregnancy One of the most important aspects of obstetrical care is to date, as precisely as possible, the beginning of pregnancy so that the estimated time of arrival ETA can be calculated sometimes referred to as the estimated date of confinement — EDC. And yet, even with all of the available technology, one of the puzzles of modern obstetrics, is that the obstetrician has not yet learned how to accurately date the beginning of a pregnancy. Pregnancy can be measured in two different ways. The most common and most often used in clinical obstetrics is the measurement of the gestational age of the pregnancy. The gestational age of the pregnancy is measured from the first day of the last menstrual period. In this way of dating the pregnancy, the pregnancy is 40 weeks in duration on average instead of the actual 38 weeks.
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Dating the Beginning of Pregnancy

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Fetal Growth FAQ

Measuring[ edit ] Diagram showing crown-rump length by gestational age. The blue line is the mean and the green area delimits the 3rd versus the 97th percentile. The measurement can actually vary slightly if the fetus is temporarily stretching straightening its body. The measurement needs to be in the natural state with an unstretched body which is actually C shaped. The measurement of CRL is useful in determining the gestational age menstrual age starting from the first day of the last menstrual period and thus the expected date of delivery EDD.
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Crown-rump length

This implies that in diagnosing SGA births, a considerable misclassification occurs if previous births are not taken into account. Growth-charts This tendency to repeat weight in successive gestations represents not the only difficulty in determining whether a baby is really SGA or not. The growth charts in use are based on different population samples and the construction of the charts is based on varying methods.
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Abstract Background: Fetal growth is influenced by many factors such as race, socioeconomic status, genetics, geographical location, maternal diseases, and number of babies. Consequent upon these, fetal growth charts may vary from one location to another even within the same geographical entity. Objective: This study was designed to establish the fetal growth chart in antenatal women who had ultrasound scanning at the University of Nigeria Teaching Hospital, Enugu, South East Nigeria. Patients and Methods: This is a descriptive analysis of fetal biometric measurement of antenatal women. Four hundred and seventy pregnant women were studied.

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