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Membrane glycerol permeability (exponential rate coefficient) of human sperm from 90% phase versus 45% phase, after gradient sperm separation (A); and sperm from men with normozoospermia versus sperm from men with asthenozoospermia (B). Results presented in min. to max. graphs, with a cross representing the mean of the sample size. Significantly different results (p < 0.05) are indicated as: *. (A) n = 12; (B) n = 30.
