Table 1.

Body and organ weights after MTBE gavage exposure: 7-day study in adult male CD-1 mice

	Corn oil control	400 mg/kg MTBE	1000 mg/kg MTBE	2000 mg/kg MTBE
	Absolute weight (g)
Final body weight	42.3 ± 1.90	41.8 ± 2.21	42.3 ± 2.02	42.2 ± 2.09
Testes	0.255 ± 0.033	0.242 ± 0.023	0.278 ± 0.022	0.248 ± 0.031
Epididymides	0.108 ± 0.008	0.110 ± 0.008	0.111 ± 0.009	0.116 ± 0.006
Seminal vesicles	0.302 ± 0.067	0.321 ± 0.081	0.308 ± 0.037	0.326 ± 0.045
Liver	2.24 ± 0.236	2.26 ± 0.215	2.15 ± 0.281	2.12 ± 0.213
Brain	0.490 ± 0.023	0.507 ± 0.021	0.509 ± 0.226	0.509 ± 0.023
	Ratio of organ:final body weight (%)
Testes	0.60 ± 0.06	0.58 ± 0.06	0.66 ± 0.05	0.59 ± 0.06
Epididymides	0.25 ± 0.02	0.27 ± 0.02	0.26 ± 0.03	0.28 ± 0.01
Seminal vesicles	0.71 ± 0.15	0.78 ± 0.23	0.73 ± 0.08	0.77 ± 0.08
Liver	5.30 ± 0.55	5.44 ± 0.62	5.08 ± 0.58	5.01 ± 0.39
Brain	1.16 ± 0.04	1.21 ± 0.07	1.21 ± 0.07	1.21 ± 0.06

Notes: Gavage treatment consisted of MTBE in corn oil on days 1, 3, and 5 at doses of 0 (vehicle only), 400, 1000 or 2000 mg/kg MTBE, n=6. 2.5 IU/g body weight hCG was administered ip on day 6 and necropsy was on day 7. Values in the table are mean ± standard deviation. No significant differences were observed across the groups (p>0.05).