| Type | MGI:General | Description | following matings with superovulated females less than 0.5% of recovered eggs appear to be fertilized when sperm are incubated with cumulus free eggs only 3% of the eggs reach the 2-cell stage and none develop into blastocysts when sperm are incubated with zona pellucida-free eggs only 29% of the eggs reach the 2 cell stage and only 20% develop into blastocysts compared to about 87% (2-cell) and 69% (blastocyst) for heterozygous sperm |
