| 
      
        | Conc. (µM) | Vitamin E
                (or α-tocopherol) |  
        | Number of oocytes insemination | Cleavage (mean% ± S.E.) | Morula (mean% ± S.E.) | Blastocyst
                (mean% ± S.E.) |  
        | 0 | 284 | 64.6 ± 1.5 | 33.5 ± 1.4 | 11.4 ± 1.2 |  
        | 50 | 286 | 64.9 ± 1.7 | 34.1 ± 1.6 | 12.5 ± 1.5 |  
        | 100 | 290 | 65.7 ± 1.2 | 36.0 ± 1.3 | 12.9 ± 1.0 |  
        | 200 | 284 | 67.0 ± 1.1 | 37.5 ± 1.9 | 14.8 ± 1.2 |  
        | 400 | 276 | 64.7 ± 1.3 | 33.8 ± 1.4 | 11.6 ± 1.1 |  |