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Table 2 Rates of survival, pronuclei formation and development to morulae and blastocysts of IVM, MII and aged oocytes following ICSI.

From: Reduced developmental competence of immature, in-vitro matured and postovulatory aged mouse oocytes following IVF and ICSI

 

IVM

Ovulated

13 hr Aged

No oocytes injected

195

263

251

No. oocytes survived

91 (47%)a, b, d

149 (57%)a, d

155 (62%)a, b

2 PN

89 (98%)

141 (95%)

145 (94%)

2-cells/survived

72 (79%)a, c

133 (89%)a

139 (90%)c

4-cells/survived

34 (37%)c

122 (82%)c

107 (69%)c

8-cells/survived

16 (18%)a

116 (78%)a

81 (52%)a

No. blastocysts/survived

5 (5%)a

106 (71%)a

62 (40%)a

  1. Similar letters indicate statistical differences between groups of the same developmental stage
  2. ap < 0.001; bp,0.005; cp < 0.01; dp,0.05