Table 2.
Univariate Comparison of Exposure Factors Between Blastocyst Formation Group and the Non-Blastocyst Formation Group
| Blastocyst Formation Group (n=141) | Non-Blastocyst Formation Group (n=82) | Z/χ2 | P | |
|---|---|---|---|---|
| Age | 30.00(5.00) | 29.0(5.00) | −0.721 | 0.471 |
| Number of embryonic cells ** | ||||
| n≤6 | 45(31.91%) | 60(73.17%) | 35.42 | <0.001 |
| 6<n≤9 | 87(61.70%) | 20(24.39%) | ||
| 9<n | 9(6.38%) | 2(2.44%) | ||
| % fragmentation** | ||||
| F≤10 | 90(63.83%) | 37(45.12%) | 25.038 | <0.001 |
| 10<F≤15 | 41(29.08%) | 18(21.95%) | ||
| 15<F | 10(7.09%) | 27(32.93%) | ||
| Morphological grade** | ||||
| Grade A | 59(41.84%) | 3(3.66%) | 60.85 | <0.001 |
| Grade B | 58(41.13%) | 27(32.93%) | ||
| Grade C | 24(17.02%) | 52(63.41%) | ||
| The mtDNA/gDNA ratio** | 29.09(41.8) | 39.15(43.39) | 4462.50 | 0.005 |
Note: **Statistically significant differences, with P < 0.01.