Table 2 Pregnancy outcomes following transferring embryos with or without blastomere loss
|  | Intact embryo group (n = 5873) | Blastomere loss group (n = 414) | P |
|---|---|---|---|
Implantation rate (n,%) | 1853/5873 (31.56%) | 87/414 (21.01%) | < 0.001 |
Biochemical pregnancies (n,%) | 2054/5873 (34.97%) | 102/414 (24.64%) | < 0.001 |
Clinical pregnancies (n,%) | 1801/5873 (30.67%) | 87/414 (21.01%) | < 0.001 |
Ongoing pregnancies (n,%) | 1505/5873 (25.63%) | 65/414 (15.70%) | < 0.001 |
Live birth (n,% per embryo transfer cycle) | 1463/5873 (24.92%) | 59/414 (14.25%) | < 0.001 |
Live birth (n,% per clinical pregnancy) | 1463/1801 (81.23%) | 59/87 (67.82%) | 0.003 |
 Singleton (% per live birth) | 1437/1463 (98.22%) | 59/59 (100%) | 0.622 |
 Twins (% per live birth) | 26/1463 (1.78%) | 0/59 (0%) |  |
Ectopic pregnancy (n,%) | 52/5873 (0.89%) | 1/414 (0.24%) | 0.260 |
Biochemical pregnancy losses (n,%) | 201/2054 (9.79%) | 14/102 (13.73%) | 0.195 |
Early miscarriages (n, % per clinical pregnancy) | 296/1801 (16.44%) | 22/87 (25.29%) | 0.039 |
Second trimester abortions (n, % per clinical pregnancy) | 40/1801 (2.22%) | 5/87 (5.75%) | 0.053 |
Stillbirths (n, % per clinical pregnancy) | 2/1801 (0.11%) | 1/87 (1.45%) | 0.132 |