The aim of this study was to describe the relationships of the abdominal organs of the newborn calf regarding its physiology and topography. The focus of this investigation was on the stomach departments, the intestine, the liver and kidneys. For this purpose, computerized tomographic scans were performed on 15 healthy Holstein Friesian calves. Imaging was conducted on the 1st, 7th, 14th and 21st day of life. On the first day of life, an examination of the calves was performed right after birth and three shots were taken every six hours. In summary following relevant results were obtained: - Based on the total stomach volume, the reticulum volume has an average share of 50.1 %, the abomasum occupies about 42 % of the volume immediately after birth. - 12 hours post natum and after ingestion of colostrum, the volume of the abomasum increases to 1.6 l and exceeds the reticulum volume by more than twice. It can be stated that total volumes of abomasum and reticulum change drastically after the first ingestion of milk. Rumen and reticulum require only 28.2 % and the abomasum 69 % of the total stomach volume. - The abomasal volume reaches its maximum one-week post natum and decreases with the beginning of first fibre intake. At the same time, the volume of the reticulum increases steadily in its total volume and percentage among the total stomach volume. - Distinct rumen stratification was observed in 20 % of calves one-week post natum, after 21 days this could be detected in all calves. The investigations of one-day-old calves show a two-layered rumen of air-like and homogeneous contents. The homogeneous ventral content is composed after first milk administration, resulting in a mixture of colostrum and incurred casein cake. - Concerning the liver, a steady parenchymal compression in the first three weeks of life could be observed. In the scans from the first day the calves central average values of 51.54 to 55.97 HU and peripherally 56.98 to 59.85 HU were measured. In the following three weeks, the mean density increased both peripherally and centrally to levels of 61.26 HU and 67.29 HU. - Moreover, a change in total liver volume on the first day of life could be quantified. The hepatic tissue volume decreased significantly in all calves in the first few hours of life. One-hour post natum the measurements indicated an average volume of 1003.4 cm³, which decreased to 892.3 cm³ for the second study and to 887.1 cm³ for the second. - The kidneys showed no significant topographical changes in the course of the study. Already for the first examination, the left kidney is indistinctively located caudal to the right. The left kidney was located to the left of the median in the first three weeks of life of the calf and dorsolateral to the abdominal wall or pushed by the rumen towards the median. - The hilum of the left kidney points ventrally in the caudal region and the cranial region medially. This 90° rotation due to the strain of the rumen can already be observed one-hour post natum. - The craniocaudal length of the kidneys does not change significantly in the first three weeks of life. Nevertheless, the volume increases within the first week of life by 31 %. It reaches on the 21st day of life a increase compared to the initial situation by 50 %. The present study shows the abdominal topographic conditions in neonatal calves using computed tomography at a high examination frequency for the first time. It thus provides the basis for further investigations, e.g. in connection with the question of drenching.