Article Figures & Data
Figures
- FIG 1.
Imaging criteria for early CC identification. A, A hypoechogenic structure (double arrows) crossing the midline of the brain above the echogenic tela choroidea (single arrow), located beneath the pericallosal artery (black arrows, B).
- FIG 2.
The growing early CC between 13 and 18 weeks. Marked in each image are the tela choroidea (black arrowhead) and CC (white arrowheads). W indicates weeks.
- FIG 3.
Absent early CC. A, In the coronal plane of the third ventricle and thalami, structures crossing the midline are not apparent, resulting in an unroofed third ventricle (star). B, In the midsagittal plane, a prominent unroofed third ventricle (star) is observed in the designated location of the absent CC. C, Fetal MR imaging at 16 + 6 gestational weeks in the sagittal plane demonstrating the absence of the CC, resulting in an unroofed third ventricle (star) with the partial volume effect of the interthalamic adhesion and the anterior portion of the postcommissural fornix (white arrows). D, MR imaging in the coronal plane shows the unroofed third ventricle (black star) and the adjacent thalami (white stars).
- FIG 4.
A, Short and dysgenetic CC in Rubinstein-Taybi syndrome at 19.3 weeks. The rostrum is absent, the genu is underdeveloped (single arrow), and the splenium is short (double arrow), terminating prematurely at the anterior aspect (vertical line) of the massa intermedia (star). B, A normal CC at 19 weeks for comparison. The rostrum and genu (double arrow) are apparent and splenium (single arrow) is observed to extend beyond the posterior border (vertical line) of massa intermedia (star).
Tables
Characteristics n = 187 Age (yr) 32.3 (SD, 4.6) IVF 16.5% (31/187) Prepregnancy weight (mean) (Kg) 63.8 (SD, 12.6) Height (mean) (cm) 163.15 (SD, 6.6) BMI (mean) 24 (SD, 4.1) Gravidity (mean) 2.5 (SD, 1.6) Parity 1 (SD, 1.1) Note:—IVF indicates in vitro fertilization; BMI, body mass index.
↵a Data are presented as mean or percentage (n/N).
Pearson Correlation Coefficient (r) P Value GA 0.948 <.001 Head circumference 0.964 <.001 Abdominal circumference 0.948 <.001 Femur length 0.377 <.001 Estimated fetal weight 0.960 <.001 Week No. 1st 3rd 5th 10th 25th 50th 75th 90th 95th 97th 99th 13 20 1.16 1.33 1.43 1.57 1.81 2.08 2.34 2.58 2.72 2.82 3.00 14 43 1.22 1.49 1.63 1.86 2.23 2.64 3.06 3.43 3.66 3.80 4.08 15 30 1.74 2.14 2.35 2.67 3.21 3.81 4.41 4.96 5.28 5.49 5.90 16 28 2.80 3.35 3.64 4.08 4.83 5.66 6.49 7.24 7.68 7.97 8.54 17 23 4.45 5.18 5.57 6.16 7.16 8.26 9.36 10.35 10.95 11.33 12.09 18 23 6.78 7.72 8.21 8.98 10.26 11.69 13.11 14.39 15.16 15.65 16.63 19 20 9.83 11.02 11.64 12.61 14.23 16.02 17.81 19.43 20.40 21.02 22.25 ↵a Modeled are the first 99th centiles and reference range from the 13th to 19th week of gestation.
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