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The present study was undertaken to determine the effect of a phosphodiesterase (PDE) type-5 (cyclic guanosine monophosphate-specific) inhibitor, sildenafil, on capacitation and penetration of boar spermatozoa in a basic chemically defined medium (adenosine- and theophylline-free PGM-tac4). When ejaculated spermatozoa were cultured for 90 minutes in the absence or presence of sildenafil at 2.5 mM,...
Thawing process is important in semen cryopreservation as it brings back the sperm cell to physiologic temperature reactivating the metabolism. Aims of the present study were to evaluate survival rate and in vitro penetrability of boar frozen spermatozoa after rapid and transient thawing at a high temperature followed by a warming procedure at 39 °C. Ejaculated semen samples were diluted in an egg...
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