Stage of development | C [n = 85] | C+ OT [n = 80] | PB [n = 85] | PB + OT [n = 50] | P-value |
---|---|---|---|---|---|
2-cell stagea | 91.7 ± 4.0 | 87.5 ± 2.4 | 88.2 ± 3.5 | 88.0 ± 2.4 | 0.81 |
4-cell stagea | 83.5 ± 2.5 | 80.0 ± 4.9 | 80.0 ± 6.8 | 76.0 ± 4.9 | 0.76 |
8–16 cell stagea | 57.6 ± 4.7 | 61.2 ± 8.1 | 60.0 ± 7.3 | 58.0 ± 7.4 | 0.96 |