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Representative traces of stopped-flow osmotic water permeability measurements obtained from human ejaculated semen of normospermic (A,C) and sub-fertile (B,D) subjects. Sperm cells were exposed to a 150 mOsm osmotic gradient in two different conditions: untreated cells (Control; (A,B)) and cells treated for 45 min with 50 μM H2O2 to induce an oxidative stress condition (H2O2-treated; (C,D)). k relative values of single curves are also shown.
