diameter

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Related to biparietal diameter: occipitofrontal diameter
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GA = gestational age in weeks, calculated from last menstrual period; BPD = biparietal diameter, FL = femur length, HC = head circumference and AC = abdominal circumference; all measurements in mm):
These parameters have their own limitations as biparietal diameter after 26 weeks becomes more related to growth and also unreliable in conditions altering the shape of skull i.
In this paper, a dynamic approach for measuring Biparietal Diameter using improved Image processing techniques is presented.
We obtained similar results when we estimated gestational age using biparietal diameter measurements (not shown).
femur length, biparietal diameter, head circumference and abdominal circumference were positively correlated with fetal kidney volume in our study.
Therefore, we also report associations of exposure with biparietal diameter (the widest diameter of the head), which we assessed at the first trimester examination; this was strongly correlated with head circumference during the second and third trimesters (coefficient of correlation, 0.
Regarding body sizes: cephalocaudal lenght (CCL); crown-rump lenght (CRL); cephalic lenght (from occipital bone to the nouse anterior limit, CL) and biparietal diameter.
Appropriate fetal growth was defined by the presence of ultrasonographic signs (when biparietal diameter and abdominal circumference were between the 10th and 90th percentiles) according to the normograms of Campbell and Thoms (6) and by postnatal confirmation of a birth weight between the 10th and 90th percentiles according to our population standards after correction for maternal height, weight, and parity and the sex of the newborns.
1-12) Estimated gestational age by ultrasound was derived from correlational standards for biparietal diameter, head circumference, femur length, and abdominal circumference.
The biparietal diameter was measured from outer table of nearest parietal bone to the table of farthest parietal bone with the midline falx perpendicular to the ultrasonic beam.
Sylvie Nguyen The Tich of University Hospital, Angers, France, and her colleagues, also found that this biparietal diameter is significantly larger in term newborns than in preterm newborns when measured at term equivalent age.
Appropriate fetal growth was defined by the presence of ultrasonographic signs (when the biparietal diameter and abdominal circumference were between the 10th and 90th centiles) according to the nomograms of Campbell and Thoms (10) and by postnatal confirmation of a birth weight between the 10th and 90th centiles according to our population standards after correction for the mother's height, weight, and parity and the sex of the newborn.