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Objective: To gather detailed morphometric data to be able to assess fetal development of the duodenum and its morphology. Material and Method: The present study was carried out on 222 human fetuses (114 males, 108 females) aged 9–40 weeks of gestation with no external pathology or anomaly. Fetuses were grouped based on gestational weeks, months and trimesters. Once general external measurements of the fetuses were carried out, the abdominal wall was dissected. The relationships between the duodenum and surrounding structures and its localization were determined. Morphometric data on height, width, length and diameters were gathered. Findings: Means and standard deviations of all parameters were calculated for each gestational week, month and trimester. There were significant relations between measured parameters and gestational age (p < 0.001). There were no sex differences in parameters (p > 0.05). All data were compared with previous studies and discussed. Conclusion: Data obtained in this study will contribute to other studies carried out in obstetrics, perinatology, forensic medicine and fetal pathology departments, aimed at identifying anomalies, pathologies and variations of the duodenum and treatment of such cases.

The aim of this study was to determine the development, location, and size of the urinary bladder during the fetal period. The study was performed on 149 human fetuses between 9 and 40 weeks of gestation. The location of the urinary bladder with respect to transverse plane between the highest point of pubic symphysis and the sacral promontory and median sagittal plane was first determined. The dimensions and the angle of the urinary bladder were measured, and bladder shapes were determined. In addition, the edges of the vesical trigone were measured. There was no significant difference between sexes for any of the parameters (P > 0.05). A significant correlation was observed between all parameters and gestational age (P < 0.001). The urinary bladder was located above the transverse plane in most of the cases (83%) and in the median sagittal plane in every case. It was determined that the angle of bladder did not change and the mean value of the angle was 151 degrees during the fetal period. Bladder was categorized into four different shapes (ellipsoid, round, cuboid, and triangular), and the most common shape found during the fetal period was cuboid. The vesical trigone was an isosceles triangle during the fetal period. The new data provided by this study will enable evaluation of the development of the fetal urinary bladder, and should be useful in several fields such as anatomy, fetopathology, medical imaging, obstetrics, and pediatric urology.

New data are derived for human fetuses to evaluate diaphragmatic development. Data acquired in this study are believed to contribute to studies of obstetrics, perinatology, forensic medicine and fetal pathology on fetal development of the diaphragm, and diagnosis of its anomalies, pathologies and variations.