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| Treatment | Controlled gas conc. | Conc. of CO2 | Conc. of O2 | Humidity | No. of cultured embryos | No. (%) of 2-cell embryos | No. (%) of morulae/ blastocysts | No. of embryos transferred (recipients) | No. (%) of offspring |
| Control | Mixture* | 5% | 5% | 100% | 30 | 30 (100) | 30 (100) | 30 (2) | 13 (43) |
| DeO2-WP | Deoxidizing agent | Not controlled | 5% | Not controlled | 44 | 44 (100) | 44 (100) | 44 (2) | 20 (46) |
5% CO2, 5% O2 and 90% N2.
