by light microscopy , many spermatozoa ( greater than 100 per oocyte ) were seen to be bound to the oolemma , and a small proportion ( 1-2 spermatozoa ) were judged to have undergone fusion and penetration of the vitellus , as indicated by complete decondensation of their chromatin .
C0029045
oocyte
C1518586
oolemma