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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