Fig. 2

Metabolic analysis of human sperm. The motile human sperm OCR under different conditions (i.e., incubated at 4 or 37 °C for 2 h) was analyzed by the Extracellular Flux Analyzer™. a The XF Cell Mito Stress Test to monitor changes in OCR and ECAR in response to the metabolic modulators. b Basal respiration. c Maximal respiration. d Spare respiratory capacity