Table 2. Stage of development of embryos from superovulated and control rats at 48 and 72 hours after hCG treatment.
	DAY 2 – 48h			DAY 3 – 72 h
Treatment	Superovulated	Control	P value	Superovulated	Control	P value
2 cell	8 (80.0%) (a)	15 (83.3%) (a)	0.144	45 (51.7%) (a)	1 (5.0%) (b)	<0.001
3 cell	0	0	NS	11 (12.6%) (a)	7 (35.0%) (a)	0.345
4 cell	0 (a)	3 (16.7%) (a)	0.083	30 (34.5%) (a)	11 (55.0%) (b)	0.003
5 cell	0	0	NS	1(1.2%) (a)	1 (5.0%) (a)	1
Degenerated	2 (20.0%) (a)	8 (30.8%) (a)	0.057	0	2	0.157
Total	10 (a)	26 (a)	0.868	87 (a)	22 (b)	0.001

Note: Between-group differences assessed by Chi-squared test. Different letters at the same stage of development indicate a statistically significant difference between treatment groups on that specific day.