Eficiencia placentaria en cabras restringidas nutricionalmente durante la gestación

Maternal nutrition conditions placental development and the correct maternal-fetal nutritional exchange, directly affecting birth weight. The aim of this study was to determine the effect of nutritional restriction during pregnancy on placental efficiency in goats, placental weight, weight and sex of the kids. 10 Anglo-Nubian goats were used in the Department of Animal Nutrition of the National University of Rio Cuarto, which were artificially synchronized and served by natural riding. After checking their pregnancy, they were separated into a control group (C) (n=5) and a group nutritionally restricted from the second third of gestation (R) (n=5). The placentas obtained after calving were collected and weighed, at that time the weighing and sexing of the goats was also carried out. The statistical analysis of placental efficiency did not reveal statistically significant differences between group C and R (p=0.2935), although it was possible to observe a tendency to higher placental efficiency in group R, coinciding with smaller placentas and lower weight of the kids. No association was observed between placental efficiency and the sex of the kids (p=0.7127). The increase in placental efficiency could be explained by changes in the cellular and vascular histoarchitecture, to compensate for the transport of nutrients through the placenta. This study shows a trend towards greater placental efficiency in goats subjected to an energy-related nutritional restriction during gestation due to the decrease in the birth weight of the kids and the placental weight. ARK-CAICYT: ark:/s26182734/k39vq15d2