Table 3. Embryo quality grades at 48 and 72 hours after hCG treatment.
	DAY 2 – 48h			DAY 3 – 72 h
Treatment	Superovulated	Control	P value	Superovulated	Control	P value
Grade I	5 (50.0%) (a)	13 (50.0%) (a)	0.059	56 (64.5%) (a)	7 (31.8%) (b)	<0.001
Grade II	2 (20.0%) (a)	0	0.157	7 (8.0%) (a)	0 (0%) (b)	0.008
Grade III	1 (10.0%) (a)	3 (11.5%) (a)	0.317	17 (19.5%) (a)	6 (27.3%) (a)	0.021
Grade IV	0	2 (7.7%) (a)	0.157	7 (8.0%) (a)	3 (13.6%) (a)	0.205
Grade V	0	0	NS	0 (0%) (a)	4 (18.2) (a)	0.045

Note: Between-group differences assessed by Chi-squared test. Different letters at the same grade indicate a statistically significant difference between treatment groups on that specific day (P<0.01).