Abstract
The aim of the study was obtain nomogram of fetal transcerebellar diameter at 18–24
weeks of gestation with known prognosis of normal pregnancies. The study included
1236 healthy fetuses in the 18th–24th gestational week of women aged from 18 to 40
years (mean: 28.70 ± 5.26). The transcerebellar diameter, bi-parietal diameter, femur
length and abdominal circumference of the fetuses were measured. Additionally, groups
were divided according to maternal age and according to body mass index. The transcerebellar
diameter of fetuses from 18 to 24 weeks gestation varied from 18.13 ± 2.16 to 26.42
± 1.91 mm (mean: 22.12 ± 2.57 mm). Additionally, the mean and standard deviation of
transcerebellar diameter and fetal parameters were determined according to gestational
week, maternal age and maternal body mass index. Later, the correlations between transcerebellar
diameter with pregnancy week, maternal age, maternal body mass index and fetal parameters
were examined. Transcerebellar diameter was correlated with pregnancy week and fetal
parameters (p < 0.01) but was not correlated with maternal age (p > 0.01). Additionally, transcerebellar diameter and fetal parameters were determined
to show negative correlation with maternal body mass index (p < 0.01). Comparison of transcerebellar diameter with pregnancy week determined differences
between weeks (p < 0.05), but no differences for age groups and body mass index groups (p > 0.05). Maternal age and maternal body mass index are significant factors affecting
fetal development. We believe our data related to the transcerebellar diameter obtained
at the end of the study will be beneficial for assessment of fetal development and
identification of fetal anomalies.
Keywords
Pregnancy - Fetus - Cerebellum - Development - Malformation - Ultrasonography
