| Table 2. Effects of mineral oil overlay on embryo development of oocytes matured in vitro | ||||
| Mineral oil preparation | Total number of zygotes | % Cleavage ( |
% Blastocysts ( |
% Hatching ( |
|---|---|---|---|---|
| 72 hpi | 168-192 hpi | |||
| CMO | 110 | 82.2 (74) a | 40.0 (36) a | 94.4 (34) / 37.8 (34) a |
| WMO | 90 | 80.9 (89) a | 31.8 (35) a | 71.4 (25) / 22.7 (25) b |
hpi: hours post-insemination. Different superscript letters in the same column indicate a significant difference (chi-square test; *Fisher test, P < 0.05). *Hatching rates: calculated from the number of blastocysts/and presumptive zygotes, respectively.