Abstract
The transference of the nutritional function from the VYS to the chorioallantoic placenta during middle pregnancy is a key event for the activation of embryo oxidative metabolism. However, the metabolic adaptations occurring in these tissues during this critical period have not been studied to date. Herein, we investigate the VYS and placenta mitochondrial adaptations throughout gestational days 11, 12 and 13. The results reflect that, during the placentation period, mitochondrial proliferation predominates over differentiation in placenta. Besides, VYS development and mitochondriogenesis show a slowdown despite maintaining the mitochondrial OXPHOS capacities, hence becoming a supporting tissue until the placenta functions are completely available.
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