Table 1 Embryo classification based on early cleavage (A) and compaction at the morula stage (B), according to female age subgroups.
< 38 years old | 38–40 years old | > 40 years old | Total | P | |
|---|---|---|---|---|---|
A: classification of zygote initial cleavage | |||||
Normal Cleavage (NC; 1–2-4) | 262 (83%) | 263 (81%) | 172 (87%) | 697 (83%) | 0.298 |
Rapid Cleavage (RC; 1–2-3) | 29 (9%) | 27 (8%) | 10 (5%) | 66 (8%) | |
Direct Uneven Cleavage (DUC-2; 1–2-5) | 23 (7%) | 33 (10%) | 16 (8%) | 72 (9%) | |
Total | 314 | 323 | 198 | 835 | |
B: patterns of compaction at the morula stage | |||||
Fully compacted morula (FCM) | 204 (65%) | 200 (62%) | 112 (57%) | 516 (62%) | 0.144 |
Partial compacted morula with excluded cells (Exc-PCM) | 76 (24%) | 79 (24%) | 49 (25%) | 204 (24%) | |
Partially compacted morula with extruded cells (Ext-PCM) | 34 (11%) | 44 (14%) | 37 (19%) | 115 (14%) | |
Total | 314 | 323 | 198 | 835 | |
