Oxygen Consumption Rate (OCR) of experimental media was measured under basal conditions and following subsequent injections of: Oligomycin (1.5 μg/mL); Dinitrophenol (50 μM); and Rotenone and Antimycin A (0.5 μM each) to calculate the (A) Basal Respiration, (B) Maximal Respiration, (C) Proton Leak, (D) Spare Respiratory Capacity, and (E) Coupling Efficiency in NEFA-treated BeWo CT and SCT cells (n=5/group). (A, B, C) Statistical analysis was performed on DNA-normalized OCR rates via Two-Way Randomized Block ANOVA, Sidak’s multiple comparisons Test; (D, E) percent basal OCR was log transformed and analyzed via Two-Way ANOVA). (A, B, C) Respiratory activity data is expressed as OCR normalized to Fsutotal DNA content and presented as percent CT untreated control; (D, E) data is represented as percent basal OCR for each condition. Different letters denote statistical significance (p<0.05, n = 5/group).