[The effect of spermatozoal ultrastructure on the outcome of fertilization in vitro].


UNLABELLED The ultrastructure of sperm cells in cumulus oophorus of the human oocyte 20 hrs after in vitro fertilization (IVF) was studied. MATERIALS AND METHODS Mechanically removed cumular cells were processed for electron microscopy and the spermatozoa deposited in the intracellular spaces as well as those penetrating into follicular cells were… (More)