| Table 1. Characterization of the general sample and according to the occurrence of clinical pregnancy. | ||||
| Variable | PREGNANCY | |||
|---|---|---|---|---|
| Sample (n=1568) |
Yes (n=612) |
No (n=956) |
p-value | |
| n (%) | n (%) | n (%) | ||
| AGE RANGE ≤ 35 years From 36-40 years ≥41 years |
757 (48.3) 573 (36.5) 238 (15.2) |
324 (52.9) 213 (34.8) 75 (12.3) |
433 (45.3) 360 (37.7) 163 (17.1) |
0.004Q |
| EMBRYO TRANSFER STAGE Cleavage Blastocyst |
1.022 (65.2) 546 (34.8) |
350 (57.2) 262 (42.8) |
672 (70.3) 284 (29.7) |
<0.001Q |
| FREEZING TIME 0 to 90 days 91 to 180 days 181 to 360 days > 360 days |
844 (53.8) 304 (19.4) 172 (11.0) 248 (15.8) |
362 (59.2) 103 (16.8) 64 (10.5) 83 (13.6) |
482 (50.4) 201 (21.0) 08 (11.3) 165 (17.3) |
0.007Q |
| Number of embryos transfer | 1.96±0.71 [2.00] | 2.11±0.75 [2.00] | 1.87±0.66 [2.00] | <0.001W |
Q Chi-square test, W Wilcoxon Mann-Whitney test.