Table 2.

Effects of PFOA treatment on mammary gland ductal length, the number of terminal end buds (TEBs) and the number of stimulated terminal ducts (TDs) (Mean ± SD, n=5)

Treatment	Ductal Length (relative units)	Number of TEBs	Number of stimulated TDs
Balb/c
Vehicle	7.60 ± 0.94c,d	8.20 ± 1.92c,d	6.20 ± 2.39c,d
1 mg/kg	7.28 ± 0.73c,d	6.00 ± 3.74d	3.80 ± 1.64d
5 mg/kg	3.99 ± 0.36a,b	3.99 ± 0.36a,d	1.20 ± 1.30a,d
10 mg/kg	3.40 ± 4.77a,b	0.00 ± 0.00a,b,c	.00 ± 0.00a,b,c
C57BL/6
Vehicle	4.76 ± 1.19d	7.80 ± 2.39c,d	6.60 ± 2.88c,d
1 mg/kg	4.06 ± 0.85d	10.40 ± 3.36d	9.80 ± 2.77c,d
5 mg/kg	4.01 ± 0.71d	11.20 ± 1.30a,d	16.60 ± 5.90a,b,d
10 mg/kg	0.30 ± 0.67a,b,c	0.00 ± 0.00a,b,c	0.00 ± 0.00a,b,c

^ap<0.05, compared to Vehicle control group;

^bp<0.05, compared to 1 mg/kg PFOA treatment group;

^cp<0.05, compared to 5 mg/kg PFOA treatment group;

^dp<0.05, compared to 10 mg/kg PFOA treatment group.