Gestational age dating criteria

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Gestational age

gestational age dating criteria
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Committee Opinion #700, Methods for estimating the due date

To compare the accuracy of the reported date of the last menstrual period LMP with that of symphysis-fundal height SFH in the estimation of gestational age GA , using an ultrasound US scan as reference. Gestational age was concurrently assessed by the 3 methods in this prospective, population-based, pregnancy-outcome study conducted in Hyderabad, Pakistan, from June 18, , through August 31, , with women between 20 and 26 weeks of a singleton pregnancy. Knowing gestational age GA accurately is essential for optimal prenatal, delivery, and postnatal care.



























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AN ALGORITHM FOR THE ESTIMATION OF GESTATIONAL AGE AT THE TIME OF FETAL DEATH

Gestational age is a measure of the age of a pregnancy which is taken from the beginning of the woman's last menstrual period LMP , or the corresponding age of the gestation as estimated by a more accurate method if available. Such methods include adding 14 days to a known duration since fertilization as is possible in in vitro fertilization , or by obstetric ultrasonography. The popularity of using such a definition of gestational age is that menstrual periods are essentially always noticed, while there is usually a lack of a convenient way to discern when fertilization occurred.

Determination of gestational age by ultrasound

Accurate assignment of gestational age at time of fetal death is important for research and clinical practice. An algorithm to estimate gestational age GA at fetal death was developed and evaluated. The SCRN conducted a population-based case-control study of women with stillbirths and live births from to in five geographic catchment areas.

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