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Table 2 Risk to have or not to have a correlation between zygote morphology and ART outcomes

From: Pronuclear morphology evaluation for fresh in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) cycles: a systematic review

Outcome Correlation (studies; n., %) No correlation (studies; n., %) OR (95% CI) P
Embryo quality 15/25 (60) 10/25 (40%) 2.25 (0.73 to 6.98) 0.160
Cleavage stage 15/20 (75%) 5/20 (26.3%) 9.0 (2.15 to 37.66) 0.003
Blastocyst stage 7/8 (87.5%) 1/8 (12.5%) 49.0 (2.53 to 948.67) 0.010
Implantation rate 12/23 (52.2%) 11/23 (47.8%) 1.19 (0.37 to 3.79) 0.768
Pregnancy rate 12/25 (48%) 13/25 (52%) 0.85 (0.28 to 2.58) 0.777
Delivery/Live birth rate 1/4 (25%) 3/4 (75%) 0.11 (0.005 to 2.73) 0.179
Embryonic chromosome status 6/6 (100%) 0/6 (0%) 169.0 (2.89 to 9876.12 0.013
  1. OR: odds ratio, CI: confidence interval.