Table 2 Comparison of clinical parameters between the oocyte retrieval difficulty group and the control group
Difficulty group | Control | P Value | |
|---|---|---|---|
No. of cycles | 133 | 1581 | |
Total gonadotrophins dose | 1748.39 ± 654.12 | 1821.57 ± 785.23 | 0.79 |
E2 (pg/ml) in hCG Day | 3444.23 ± 2224.30 | 3451.94 ± 1663.19 | 0.99 |
Progesterone(ng/ml) in hCG Day | 0.95 ± 0.79 | 0.89 ± 0.55 | 0.59 |
Duration of COH | 10.66 ± 3.14 | 9.98 ± 2.47 | 0.149 |
No. of follicles aspirated | 12.17 ± 4.92 | 12.46 ± 4.53 | |
No. of recovered oocytes | 9.08 ± 4.65 | 12.13 ± 5.27 | P < 0.001 |
2PN-fertilization rate | 800/1116 (71.7%) | 13,290/17565 (75.7%) | 0.003 |
Cleavage rate | 774/800 (96.8%) | 12,864/13290 (96.8%) | 0.93 |
Day 3 good-quality embryo rate | 408/774 (52.7%) | 7271/12864 (56.5%) | 0.04 |
Blastulation rate | 203/423 (48.0%) | 4050/7664 (52.8%) | 0.06 |
Blastocyst utilization rate | 135/423 (31.9%) | 2838/7664 (37.0%) | 0.03 |
Day 5 blastocyst utilization rate | 90/423 (21.3%) | 2004/7664 (26.1%) | 0.02 |
Day 6 blastocyst utilization rate | 45/333 (13.5%) | 834/5660 (14.7%) | 0.58 |