Table 3.

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

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)

Fisher's exact test was performed. * P < 0.05 compared with groups at 0 and 12 h