Table 1 Comparison of fertilization characteristics between two groups
3 h group | 20 h group | P | |
|---|---|---|---|
Oocytes obtained, (n) | 1139 | 1136 | |
Metaphase II oocytes, n (%) | 1066 (93.6) | 1040(91.5) | 0.06 |
Normal fertilization (2PN), n (%) | 672 (59.0) | 700 (61.6) | 0.20 |
Polyspermy rate (>2PN), n (%) | 226 (19.8) | 171(15.1) | 0.01 |