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Table 3 Spearman’s rank correlations ( r; P ) between the publication year of the papers and the clinical efficacy of zygote morphology assessment

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

Outcome Spearman’s correlation (r) P
Embryo quality 0.712 0.280
Cleavage stage 0.546 0.340
Blastocyst stage 0.659 0.417
Implantation rate 0.378 0.543
Pregnancy rate 0.129 0.047
Delivery/live birth rate 0.713 0.434
Embryonic chromosome status 0.815 0.923