Table 2.
Comparison of the clinical data and pregnancy outcomes between the ICSI group and IVF group when ≤3 eggs were retrieved.
| Index | ICSI group (case) n = 326 | IVF group (case) n = 2,086 | P value |
|---|---|---|---|
| Gn time (d, ‾x ± s) | 8.21 ± 3.13 | 8.43 ± 3.34 | 0.298 |
| Total Gn (IU, ‾x ± s) | 1,878.37 ± 1,001.69 | 1,854.62 ± 1,007.40 | 0.708 |
| Number of eggs retrieved (x ± s) | 1.94 ± 0.82 | 1.94 ± 0.82 | 0.997 |
| MII rate (case (%)) | 543 (85.78) | 3,467 (85.58) | 0.895 |
| 2PN fertilization rate (case (%)) | 477 (87.85) | 2,775 (80.04) | <0.01 |
| Abnormal fertilization rate∗ (case (%)) | 66 (12.15) | 692 (19.96) | <0.01 |
| High-quality embryo rate (case (%)) | 258 (56.70) | 1544 (56.74)) | 0.993 |
| Cycle cancellation rate∗∗ (case (%)) | 27 (8.28) | 256 (12.27) | 0.037 |
| Fresh embryo transfer | |||
| Pregnancy rate (case (%)) | 30 (40.00) | 178 (37.71) | 0.705 |
| Miscarriage rate (case (%)) | 4 (13.33) | 27 (15.17) | 0.794 |
| Frozen-thawed embryo transfer | |||
| Pregnancy rate (case (%)) | 89 (48.63) | 128 (29.63) | <0.01 |
| Miscarriage rate (case (%)) | 13 (14.61) | 13 (10.16) | 0.321 |
| Cumulative pregnancy rate (case (%)) | 119 (46.12) | 306 (33.85) | <0.01 |
| Cumulative miscarriage rate (case (%)) | 17 (14.29) | 40 (13.07) | 0.742 |
∗(0PN + 1PN + multi-PN) fertilization. ∗∗Cancellation of cycles due to abnormal fertilization (multi-PN fertilization in the IVF group and 0PN + 1PN + multi-PN fertilization in the ICSI group).