Table 2. Implantation Rate and Live Birth Rate in Oocyte Donation Cycles Reported in the SART and HFEA Registries.
| Registry and type of oocytes | Implantation rate, % (95% CI) | P value | Live birth rate per embryo transfer, % (95% CI) | P value | ||
|---|---|---|---|---|---|---|
| Endometriosis | Nonendometriosis | Endometriosis | Nonendometriosis | |||
| SART | ||||||
| Fresh oocytes | 51.4 (45.8-56.9) | 52.8 (52.2-53.3) | .62 | 56.0 (49.0-62.9) | 55.8 (55.2-56.5) | .95 |
| Frozen oocytes | 35.8 (29.6-42.3) | 43.9 (43.2-44.5) | .01 | 40.0 (32.2-48.2) | 45.6 (44.9-46.3) | .16 |
| Thawed embryos | 41.2 (38.2-44.2) | 45.1 (44.5-45.4) | .01 | 41.5 (38.0-44.9) | 45.5 (45.2-45.8) | .02 |
| Total | 42.5 (40.1-44.9) | 46.4 (46.2-46.6) | .002 | 43.9 (41.0-46.8) | 47.3 (47.0-47.5) | .02 |
| HFEA | ||||||
| Fresh oocytes | 35.2 (31.9-38.6) | 36.6 (35.9-37.3) | .57 | 36.2 (32.0-40.5) | 40.5 (39.7-41.4) | .05 |
| Frozen oocytes | 20.2 (12.4-28.1) | 31.5 (29.3-33.7) | .02 | 25.0 (12.8-37.3) | 34.0 (31.5-36.5) | .13 |
| Thawed embryos | 31.9 (27.4-36.5) | 3.1 (29.2-31.0) | .40 | 32.8 (27.6-37.9) | 29.8 (28.9-30.8) | .24 |
| Total | 33.0 (30.5-35.6) | 34.0 (33.5-34.5) | .48 | 34.2 (31.1-37.2) | 36.1 (35.5-36.7) | .23 |
Abbreviations: HFEA, Human Fertilization and Embryology Authority; SART, Society for Assisted Reproductive Technology.