title: Use of femur length as a means of assessing M-mode ventricular dimensions during second and third trimesters of pregnancy in normal fetus.
abstract: Eighty-two normal fetuses were scanned from 18 to 41 weeks of gestation. The following M-mode measurements were correlated with the femur length: end-diastolic right ventricular (r = 0.93), left ventricular (r = 0.92), biventricular outer (r = 0.94), and biventricular inner (r = 0.94) dimensions; tricuspid (r = 0.93) and mitral (r = 0.92) valve opening excursion; right (r = 0.76) and left (r = 0.70) ventricular wall thickness; and interventricular septal thickness (r = 0.75). Polynomial regression demonstrated that linear regression best described the data from which the mean and 5% and 95% confidence limits for predicted M-mode measurements were computed for the femur length.
mesh_terms: D003971:Diastole; D005314:Embryonic and Fetal Development; D005260:Female; D005269:Femur / Q000196:embryology*; D006352:Heart Ventricles / Q000196:embryology*; D006801:Humans; D008943:Mitral Valve / Q000196:embryology / Q000502:physiology; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D013599:Systole; D014261:Tricuspid Valve / Q000196:embryology / Q000502:physiology; D014463:Ultrasonography / Q000379:methods*