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Comparison of zona removal rate between collagenase and acidified Tyrode's solution treatment
| Method of zona removal | Number of eggs | |
|---|---|---|
| Total | Zona removal rate (%) | |
| Collagenase (mg/ml) | ||
| 0.05 | 105 | 12 (11)a |
| 0.10 | 74 | 58 (78)b |
| 0.20 | 77 | 61 (79)b |
| 1.00 | 761 | 575 (75.5)b |
| Acidified Tyrode's solution | 202 | 189 (93.5)c |
Values with the same superscript are not significantly different. a–b, a–c, b–c: P < 0.01
