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Table 1 Number and developmental stage of oocytes at retrieval at different times after hCG injection.

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

Time of oocyte retrieval post-hCG (time in culture) (h)

Number of oocyes

Oocytes per cycle*

GV(%)

GVBD(%)

MII(%)

0(40–44)

147

8.2 ± 0.8

137(93.2)

5(3.4)

5(3.4)

12(38–42)

74

9.3 ± 1.1

61(82.4)

11(14.9)

2(2.7)

24(16–20)

80

13.3 ± 3.8

6(7.5)

74(92.5)

0 (0)

36(4–8)

123

17.6 ± 2.3**

4(3.3)

11(8.9)

108(87.8)

  1. GV: germinal vesicle, GVBD: germinal vesicle breakdown, MII: metaphase II *Mean ± SEM. ANOVA was performed, and **: P < 0.01 compared with group at 0 h, P < 0.05 compared with the group at 12 h