Nomograms of the axial transverse diameter of the fetal foramen magnum between 14 and 40 weeks' gestation

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
David M ShererOvadia Abulafia

Abstract

The purpose of this study was to create reference range nomograms of the axial transverse diameter of the fetal foramen magnum (TDFM) between 14 and 40 weeks' gestation. This cross-sectional study included pregnant patients between 14 and 41 weeks' gestation. Inclusion criteria consisted of well-established dates (confirmed by early sonography) and nonanomalous singleton fetuses with intact amniotic membranes. Sonographic measurements included biparietal diameter, head circumference, abdominal circumference, femur length, humerus length, transcerebellar diameter, and sonographically estimated fetal weight. Values of the TDFM were each calculated as the mean of 3 separate measurements. The 5th, 50th, and 95th percentiles were estimated at each week of gestational age (GA) by least squares regression for the mean and SD of the TDFM as functions of GA. R(2) and associated P values for the relationships between the TDFM and other biometric measurements were calculated. The study included 602 consecutive patients meeting the inclusion criteria. The mean maternal age +/- SD was 27.5 +/- 6.4 years; median gravidity, 3 (range, 1-12); and median parity, 1 (range, 0-7). The mean TDFM was 13.5 +/- 3.7 mm. The reference curve formulas for ...Continue Reading

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Citations

Jan 15, 2011·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Gary D Richards, Rebecca S Jabbour
May 17, 2014·The Cerebellum·Marta Nowakowska-KotasKrzysztof Dudek

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