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Table 3 Spindle structure and chromosome alignment in MII oocytes analysed 40–44 h after hCG priming and variable times in culture

From: Comparative maturation of cynomolgus monkey oocytes in vivo and in vitro

Time of oocyte retrieval post-hCG (time in culture) (h) Number of oocytes Spindle structure (%) Chromosome alignment (%)
   Normal Abnormal Normal Abnormal
0(40–44) 89 44 (49.4) 45 (50.6) 30 (33.7) 59 (66.3)
12(28–32) 44 25 (56.8) 19 (43.2) 15 (34.1) 29 (65.9)
24(16–20) 58 18 (31.0) 40 (69.0)* 21 (36.2) 37 (63.8)
36(4–8) 89 40 (44.9) 49 (55.1) 28 (31.5) 61 (68.5)
  1. Fisher's exact test was performed. * P < 0.05 compared with groups at 0 and 12 h