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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