Pregnancy outcomes | Single blastocyst (n = 1138) | 2+ cleavage (n = 3732) | OR (95% CI) | P value |
---|---|---|---|---|
Clinical pregnancy rate | 489 (43%) | 1627 (44%) | 0.94 (0.81, 1.09)a | 0.43 |
Live birth rate | 398 (35%) | 1378 (37%) | 0.88 (0.76, 1.03)a | 0.12 |
Miscarriage rate | 84 (17%) | 235 (14%) | 1.35 (0.99, 1.83)a | 0.06 |
Number of embryos transferred, median [Q1, Q3] | – | 2 [2, 2] | – | |
Total number of cycles with heart beats | 456 | 1,522 | – | |
Singleton rate | 443 (97%) | 1119 (74%) | 12.27 (6.99, 21.55)b | < 0.0001 |
Twins rate | 13 (3%) | 383 (25%) | 0.09 (0.05, 0.15)b | < 0.0001 |
Triplets | 0 | 19 | – | |
Quadruplets | 0 | 1 | – |