However , ovarian disease has not been observed in every trial of zona pellucida vaccination , and when observed , has not always been irreversible .
One concern with zona pellucida vaccination , in particular , is that in certain cases it appears to be correlated with ovarian pathogenesis .
Ovarian disease has not been observed in every trial of zona pellucida vaccination , and when observed , has not always been irreversible .
One concern with zona pellucida vaccination , in particular , is that in certain cases it appears to be correlated with ovarian pathogenesis .