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Table 2 Status on maturation, fertilization and development of failed-matured oocytes that survived cryopreservation

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

 

Viable GV Oocytes

Viable MI Oocytes

 

Slow-freezing

Vitrification

Slow-freezing

Vitrification

No. of oocytes matured in vitro (%)

31 (21.2) total

102 (54.0)* total

 

10 (16.7)

21 (24.4)

30 (50.8)

72 (55.4)

No. of fertilized (%)

4 (12.9) total

60 (58.8)* total

 

0 (0.0)

4 (19.0)

12 (36.0)

44 (61.1)

No. of cleaved (%)

0 (0.0) total

24 (40.0) total

 

0 (0.0)

0 (0.0)

2 (16.7)

22 (50.0)**

No. of blastocysts formed (%)

0 (0.0) total

5 (20.8) total

 

0 (0.0)

0 (0.0)

0 (0.0)

5 (22.7)

  1. *Significantly different between the GV and MI oocytes that survived (P < 0.01)
  2. ** Significantly different between the slow-freezing and vitrification groups (P < 0.05)