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Table 1 Comparison of the survival rates between the slow-freezing and vitrification groups

From: Cryopreservation of human failed-matured oocytes followed by in vitro maturation: vitrification is superior to the slow freezing method

  Slow-freezing Vitrification Total
GV + MI collected 192 262 454
GV collected 70 92 162
MI collected 122 170 292
GV + MI survival (%) 119 (62.0) 216 (82.4) * 335 (73.8)
GV survival (%) 60 (85.7) 86 (93.5) 146 (90.1)
MI survival (%) 59 (48.4) 130 (76.5) * 189 (64.7) **
  1. *Significantly different between the slow-freezing and vitrification groups (P < 0.01)
  2. **Significantly different between the number of GV and MI that survived (P < 0.01)