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Table 6 Comparison of pregnancy outcomes for single embryo transfers based on modified SART scores

From: Assisted hatching of vitrified-warmed blastocysts prior to embryo transfer does not improve pregnancy outcomes

  Modified SART Score Assisted Hatched Non-Assisted Hatched RR (95% CI) P-value
Conception Rate Good 36.9% (100) 50.0% (10) 0.74 (0.46–1.18) 0.34
Fair/Poor 35.4% (412) 38.8% (40) 0.91 (0.71–1.18) 0.52
Implantation Rate Good 29.2% 40.0% 0.36
Fair/Poor 27.2% 28.2% 0.83
Clinical Pregnancy Rate Good 28.4% (77) 40.0% (8) 0.71 (0.40–1.25) 0.31
Fair/Poor 26.5% (308) 27.2% (28) 0.97 (0.70–1.35) 0.91
Clinical Pregnancy Loss Rate Good 25.1% (70) 13.0% (3) 1.92 (0.66–5.63) 0.31
Fair/Poor 17.9% (12) 14.3% (1) 1.25 (0.19–8.27) 1.00
Live Birth Rate Good 21.1% (55) 31.6% (6) 0.67 (0.33–1.35) 0.26
Fair/Poor 17.6% (200) 16.3% (16) 1.08 (0.68–1.72) 0.89