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Table 5 Zygote morphology related to embryo cleavage and embryo quality.

From: Analysis of pronuclear zygote configurations in 459 clinical pregnancies obtained with assisted reproductive technique procedures

  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)