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Zygote morphology related to embryo cleavage and embryo quality.
| P1 | P2 | ||||
|---|---|---|---|---|---|
| ≥4 blastomeres | Excellent Quality | ≥4 blastomeres | Excellent Quality | OR (IC 95%) | |
| <32 | 79/89 (88.8) | 40/89 (44.9) | 123/150 (82.0) | 56/150 (37.3) | n.s |
| 33-37 | 134/170 (78.8) | 65/170 (38.2) | 224/303 (73.9) | 113/303 (37.3) | n.s |
| 38-41 | 101/128 (78.9) | 55/128 (43.0) | 185/226 (81.9) | 94/226 (41.6) | n.s |
| Total | 314/387 (81.1) | 162/387 (41.9) | 532/679 (78.4) | 258/679 (38.0) | |
