Table 2.
Predictors of preeclampsia in singleton and twin births by oocyte source and embryo type
| Singleton Birth | Twin Birth | |||||||
|---|---|---|---|---|---|---|---|---|
| Autologous | Donor | Autologous | Donor | |||||
| Variable N (%) | Fresh (N=10137) | Cryopreserved (N=1557) | Fresh (N=861) | Cryopreserved (N=363) | Fresh (N=6742) | Cryopreserved (N=809) | Fresh (N=855) | Cryopreserved (N=142) |
| Preeclampsia | 468 (4.6) | 114 (7.3) | 105 (12.2) | 32 (8.8) | 1148 (17.0) | 172 (21.3) | 230 (26.9) | 42 (29.6) |
| Preeclampsia with preterm delivery | 168 (1.7) | 41 (2.6) | 37 (4.3) | 14 (3.9) | 832 (12.3) | 129 (16.0) | 166 (19.4) | 34 (23.9) |
| # of embryos transferred | ||||||||
| 1 | 2006 (19.8) | 453 (29.1) | 152 (17.7) | 99 (27.3) | 70 (1.0) | 22 (2.7) | <5 | <5 |
| 2 | 5614 (55.4) | 802 (51.5) | 674 (78.3) | 212 (58.4) | 4744 (70.4) | 559 (69.1) | 806 (94.3) | 104 (73.4) |
| 3+ | 2517 (24.8) | 302 (19.4) | 35 (4.1) | 52 (14.3) | 1928 (28.6) | 228 (28.2) | 45 (5.3) | 34 (23.9) |
| # embryos transferred (mean ± S.D.) | 2.2 (1.0) | 2.0 (0.8) | 1.9 (0.5) | 1.9 (0.7) | 2.4 (0.9) | 2.4 (0.8) | 2.1 (0.3) | 2.3 (0.6) |
| # prior ART cycles | ||||||||
| 0 | 5240 (51.7) | 249 (16.0) | 362 (42.0) | 43 (11.9) | 3464 (51.4) | 107 (13.2) | 340 (39.8) | 12 (8.5) |
| 1+ | 4896 (48.3) | 13.8 (84.0) | 499 (58.0) | 320 (88.2) | 3278 (48.6) | 702 (86.8) | 515 (60.2) | 130 (91.6) |
| Vanishing twin/triplet | 864 (8.5) | 88 (5.8) | 82 (9.6) | 26 (7.4) | 395 (5.9) | 32 (4.1) | 13 (1.5) | 10 (7.3) |