Table 2.
Cycle Characteristics of all the participants (N = 6110).
| OS/FP quartile | P-valuea | ||||
|---|---|---|---|---|---|
| Q1 (<0.57) | Q2 (0.57, 0.67) | Q3 (0.67, 0.77) | Q4 (≥0.77) | ||
| Retrieved oocytes | 11.4 ± 6.5 | 11.9 ± 6.3 | 12.6 ± 7.1 | 11.4 ± 6.3 | <0.001 |
| Fertilization rate, % | 68.0 ± 22.5 | 68.7 ± 22.6 | 69.9 ± 22.4 | 70.4 ± 22.4 | <0.01 |
| Cleaved embryos | 7.3 ± 4.6 | 7.7 ± 4.8 | 8.3 ± 5.0 | 7.5 ± 4.6 | <0.001 |
| Good-quality embryos rate, % | 64.6 ± 31.8 | 65.8 ± 32.6 | 65.3 ± 30.8 | 63.7 ± 32.0 | 0.208 |
| Embryos cultured past day 3b | 6.7 ± 4.1 | 7.0 ± 4.2 | 7.3 ± 4.1 | 6.6 ± 3.9 | <0.01 |
| Blastocyst formation rate, % | 46.8 ± 28.4 | 48.0 ± 28.6 | 44.7 ± 27.6 | 46.0 ± 30.2 | 0.067 |
| High-quality blastocyst rate, % | 35.8 ± 27.8 | 36.6 ± 27.2 | 33.3 ± 26.3 | 32.7 ± 28.0 | <0.01 |
| Fresh cycles with embryo transferc | 636 (40.7) | 823 (44.9) | 525 (42.4) | 664 (44.9) | 0.042 |
| Number of embryos transferred | 1.8 ± 0.4 | 1.8 ± 0.4 | 1.8 ± 0.4 | 1.9 ± 0.4 | 0.034 |
| Clinical pregnancy | 297 (46.7) | 388 (47.1) | 260 (49.5) | 313 (47.1) | 0.735 |
| Live birth | 233 (36.6) | 272 (33.0) | 204 (38.9) | 233 (35.1) | 0162 |
| Spontaneous abortion before GW 12 | 32 (5.0) | 59 (7.2) | 33 (6.3) | 43 (6.5) | 0.420 |
| Ectopic pregnancy | 4 (0.6) | 9 (1.1) | 5 (1.0) | 8 (1.2) | 0.738 |
Data was described as mean ± SD or n (%). GW, gestational week.
aP values were calculated from nonparameter test (Kruskal-Wallis) or χ2 test.
bA total of 2812 participants had embryos continuously cultured to the blastocyst stage.
cA total of 2648 participants transferred embryos in this fresh cycle.