quantitative evaluation of the fetal cerebellar vermis using the median view on two-dimensional ultrasound

Background: evaluation of the cerebellum and vermis is one of the integral parts of the fetal cranial anomaly screening. objectives: the aim of this study was to create a nomogram for fetal vermis measurements between 17 and 30 gestational weeks. patients and methods: this prospective studywasconductedon171 volunteer regnan two men between march 2013 and december 2014. measurements of the fetal cerebellar vermis diameters in the sagittal plane were performed by two-dimensional transabdominal ultrasonography. results: optimal median planes were obtained in 117 of the cases. vermian diameters as a function of gestational age were expressed by regression equations and the correlation coefficients were found to be highly statistically significant (p < 0.001). the normal mean (±standard deviation) for each gestational week was also defined. conclusion: this study presents the normal range of the two-dimensional fetal vermian measurements between 17 and 30 gestational weeks. in the absence of a three-dimensional ultrasonography, two-dimensional ultrasonography could also be used confidently with more time and effort.