Table 4. Correlation BIS vs. IOM Grades during the follicle aspiration

BIS	Grade 0	Grade I	Grade II	Grade III	Total
≤39	50%(2)	50%(2)	0	0	(4)
40-50	82.4%(42)*	15.7%(8)	2%(1)	0	(51)
>50	41.2%(7)	35.3%(6)*	23.5%(4)*	0	(17)
Total	70.8%(51)	22.2%(16)	6.9%(5)	0	100%(72)