Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.4519.4522Guinea pig]]>FarkhadSanaz AlivandiZareSamad HayatgeibiHussein QadiriAli 1220071024This study is carried out to measure the changes in testosterone hormone level and changes in testes tissue on 36 adult male Guinea pigs that divided to 6 groups. Group A as control group exposed to nil Electromagnetic Field (EMF) for two hours per day for 5 days duration, group B exposed to 0.013 μT in 5 Hz to the Same duration period, group C exposed to 0.207 μT in 50 Hz in similar conditions, group D exposed for 4 h day-1 for 5 days in 0.013 μT, group E tested in 0.207 μT as group D, group F used as controlled group exposed for four hours per day in nil electromagnetic field. Guinea pig blood was tested after 5 days. Then data analyzed by t-test. The results indicated a significantly difference between control group and tested group of four and two hours, testosterone level decreased (p<=0.001), also testes tissues were sampled and observed main tissue changes in some treatments.]]>Aisha, A.,200624460476Attia, A.A. and A.M. Yehia,20025931937Bahaediny, A.,20022002 Benquet, C. and P. Roux,1998+2 and functional alterations in lymphocytes and macrophages after in vitro exposure to static magnetic field.]]>546376Blackman, C.F.,200122122128Chen, K.M.,19921992Gang, C.H.,2000108967972Lai, H. and W.A. Seattle,20012001pp: 15Jafar, S.R.,1996315555Joseph, M.,1998102831Lokhmatova, S.A.,1993275054Mostafa, R.M., Y.M. Moustafa, F.M. Ali and A. Shafik, 200652363369Okano, S.,200253127135Ozguner, M., A. Koyu, G. Cesur, M. Ural, F. Ozguner, A. Gokcimen and N. Delibas,200526405410Patrizia, T.,2005 electromagnetic fields: Effects on liver spleen and brain.]]>445159Persinger, M.A.,197216163169Rodriguez, M.,200425508515Sabo, J., L. Mirossay and L. Hororcak,200256227231Strasak, L. and J. Smarad,2002Escherichia coli.]]>55161164Zsolt, F.,200448390Akdag, M.Z., S. Dasdag, F. Aksen, B Isik and F. Yilmaz,200612BR366BR371