Table 1:
Cycle Characteristics among the three groups defined by Endometrial Pattern observed during a Cycle.
| Variable | Endometrial pattern (n=970)* | p value | ||
|---|---|---|---|---|
| Trilinear (n=776) | Semitrilinear (n=157) | Unilinear (n=37) | ||
| Cycle, n (%) | ||||
| Fresh | 639 (82.3) | 86 (54.8) | 28 (75.7) | <0.0001 |
| Frozen | 137 (17.7) | 71 (45.2) | 9 (24.3) | |
| Number of oocytes retrieved ** | 17.0 (12.0) | 17.0 (9.0) | 19.0 (14.0) | 0.43 |
| Number of fertilized embryo ** | 8.0 (7.0) | 7.0 (9.0) | 8.0 (8.0) | 0.12 |
| Stimulation Protocol, n (%) | ||||
| GnRH antagonist | 66 (8.5) | 8 (5.2) | 3 (8.1) | <0.0001 |
| E2/P4 | 170 (22.0) | 81 (52.6) | 11 (29.7) | |
| Long GnRH agonist | 387 (50.1) | 45 (29.2) | 17 (46.0) | |
| MicroDose | 150 (19.4) | 20 (13.0) | 6 (16.2) | |
| Endometrial thickness (mm), n (%) | ||||
| <8.0 | 45 (5.9) | 10 (6.4) | 1 (2.8) | 0.79 |
| 8.0–14.0 | 598 (77.4) | 117 (74.5) | 27 (75.0) | |
| >14.0 | 130 (16.8) | 30 (19.1) | 8 (22.2) | |
| Peak serum oestradiol (pg/mL), n (%) | ||||
| < 1716 | 209 (27.1) | 79 (52.0) | 11 (29.7) | <0.0001 |
| 1716–3161 | 276 (36.0) | 35 (23.0) | 9 (24.3) | |
| ≥3162 | 282 (36.8) | 38 (25.0) | 17 (46.0) | |
| # of embryo transferred, n (%) | ||||
| 1–2 | 665 (85.7) | 134 (85.4) | 30 (81.1) | 0.74 |
| 3–5 | 111 (14.3) | 23 (14.6) | 7 (18.9) | |
| Quality of the embryo, n (%) | ||||
| Good | 390 (58.0) | 76 (58.0) | 22 (66.7) | 0.84 |
| Fair | 236 (35.1) | 45 (34.4) | 10 (30.3) | |
| Poor | 46 (6.9) | 10 (7.6) | 1 (3.0) | |
| Stage at embryo transfer, n (%) | ||||
| Cleavage stage | 362 (46.7) | 49 (31.2) | 15 (40.5) | 0.0016 |
| Blastocyst stage | 414 (53.4) | 108 (68.8) | 22 (59.5) | |
| Assisted Hatching, n (%) | ||||
| Yes | 218 (28.3) | 90 (57.3) | 13 (35.1) | <0.0001 |
| No | 553 (71.7) | 67 (42.7) | 24 (64.9) | |
| Reduced Ovarian reserve, n (%) | ||||
| Yes | 89 (11.5) | 21 (13.4) | 6 (16.2) | 0.57 |
| No | 687 (88.5) | 136 (86.6) | 31 (83.8) | |
*
Endometrial pattern not reported on 64 cycles.
**
Median (IQR).
Percentages are column percentages.
Chi-square and Kruskal-Wallis tests were used as appropriate.