| Intact embryo group (n = 9846) | Blastomere loss group (n = 2259) | p value |
---|---|---|---|
Total no. of embryo transferred | 21,136 | 5036 | Â |
Embryo implantation rate (n, %)a | 4615 (21.8) | 641 (12.7) | < 0.001 |
Chemical pregnancies (n, %)b | 4134 (42.0) | 575 (25.5) | < 0.001 |
Clinical pregnancies (n, %)c | 3610 (36.7) | 499 (22.1) | < 0.001 |
Ongoing pregnancies (n, %)d | 3108 (31.6) | 423 (18.7) | < 0.001 |
Live births (n, % per embryo transfer cycle)e | 2962 (30.1) | 407 (18.0) | < 0.001 |
Live births (n, % per clinical pregnancy)f | 2962 (82.1) | 407 (81.6) | 0.791 |
 Singleton (% per live birth) | 2187 (73.8) | 332 (81.6) | 0.003 |
 Twins (% per live birth) | 76 (25.9) | 74 (18.2) | |
 Triplets (% per live birth) | 9 (0.3) | 1 (0.3) | |
Ectopic pregnancies (n, %) | 101 (1.0) | 19 (0.8) | 0.424 |
Early miscarriages (n, % per clinical pregnancy) | 501 (13.9) | 76 (15.2) | 0.415 |
Stillbirths (n, % per clinical pregnancy) | 13 (0.4) | 2 (0.4) | 0.703 |
Pregnancy termination due to fetal anomaly (n, % per clinical pregnancy)g | 11 (0.3) | 2 (0.4) | 0.666 |