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Levels of latent matrix metallopeptidase-9 (proMMP9) per cumulus-oocyte complex (COC) at 24 h of in vitro maturation (hIVM) after supplementing with human proMMP9 (hMMP9) at 0 hIVM. Cumulus-oocyte complexes were matured at 38.5 or 41.0ºC (first 12 h only and then transferred to 38.5ºC). AB Denotes means differ (P = 0.0194). Data from COCs matured at 41.0 with diluent are absent as were indistinguishable from background.
