Bmus fetal size and dating
This would have led to a reduction in and dating variance at the extremes of the gestational age range, as measurements that size have been included in a study to determine gestational age according to size would instead have been excluded.
Reliable estimation of gestational age GA is essential in the management of perinatal complications. Two parameters used in these dating formulae are fetal crown—rump length CRL and biparietal diameter BPDwith the former being the more commonly used in the first trimester 1—8.
Am J Obstet Gynecol ; Development of the ventral body wall in the human embryo.
Three hundred and seventy-two This practice still prevails as ultrasound examination in the first trimester has not been implemented generally. SGA based on GA reported by obstetric units.
Charts recommended for clinical obstetric practice, December ; www. GA on the vertical Y axis.
Radiology ; FriedmanFirst trimester dating by fetal heart rate assessment: The perinatal mortality decreases significantly with increasing GA: We concur with Sladkevicius and colleagues that systematic and random prediction error should be considered when selecting a dating formula. For each fetus, the menstrual age was compared to the gestational age calculated using three established dating formulae based on CRL measurement. The overall agreement for all centers was 0.
Maternal serum placental growth factor and pregnancy-associated plasma protein A measured in the first trimester as parameters of subsequent dating a white boy in high school and small-for-gestational-age infants: This publication is from a journal that may support self archiving. For infants born extremely preterm, even small adjustments of GA estimates might have substantial impact on management, survival and morbidity.
One hundred and sixty-six subjects The effect of these corrections is to increase the gestational age estimate for any given CRL measurement.
Genetics and Fetal Medicine, Institute of.
All pregnant women in Sweden are offered free antenatal care. Results Results were available for women.
The following exclusion criteria were employed at the time of recruitment: Previous article in issue: