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Table 3 Embryo development and utilization data

From: Severe teratozoospermia and its influence on pronuclear morphology, embryonic cleavage and compaction

  Group A Group B P value
Total embryos 901 861  
Embryonic development, D1-D3    
Syngamy (at 25 hours) 39% 34% 0.0516
Early cleavage (at 25 hours) 9% 9% 1.0000
Cleavage (D2 at 48 hours) 98% 99% 0.3833
Embryos with ≥ 6 cells (D3) 64% 66% 0.4543
Compaction    
Embryos compacting (D4) 25% 36% 0.0007
Blastulation    
Total embryos in extended culture 471 432  
Overall blastulation rate 34% 38% 0.3297
Overall utilization    
Embryos transferred 28% 30% 0.3865
Embryos frozen 34% 36% 0.3401
  1. Group A: ICSI was done using severe teratozoospermic sperm, 0-2% normal morphology, Group B: ICSI was done using dysmorphic sperm, 5-13% normal morphology. Yates-corrected Chi2 P values given above.