RESUMO
The influence of age and body weight on some genital organs was studied for 22 Holstein Friesian bulls aged 12-36 months. The bulls under investigation were from three farms and were examined at 2-week intervals. Age, body weight and measurements of some reproductive organs were positively significantly correlated among each other. Meanwhile, organs were significantly positively correlated [P <0.01] to the age from 12 to 36 months, and were significantly increased with the increase of body weight. It could be concluded that the biometry of genital organs was increased linearly as age and body weight increased in Friesian bulls, accordingly the age and body weight of bulls must be taken into consideration before selection and introducing in breeding program
Assuntos
Fatores Etários , Peso Corporal , BúfalosRESUMO
The present study was designed to clarify the profile of milk progesterone during the early stages of pregnancy, as well as the profile of milk estrone sulfate during pregnancy. 15 buffalo-cows [aged 4-8 years] were used for this study. The obtained results showed that, milk progesterone levels on the 28th day of pregnancy significantly [P <0.01] increased in the non return females [18.18 ng/ml] when compared to the return ones [7.90 ng/ml]. For that, milk progesterone level can be used as a diagnostic tool for early pregnancy in buffalo-cows. The results also revealed that, estrone sulfate level in whey significantly increased during pregnancy when compared with its level for non-pregnant animals. Its levels in whey gradually increased with the advancement of pregnancy and reached its maximum level [720.24 pg/ml] during the 7th month of gestation. One buffalo-cow aborted due to fetal death, whey estrone sulfate level dropped to 53.62 pg/ml. The six of the fetus has no significant effect on the level of whey estrone sulfate. For that, estrone sulfate levels in whey were used as a tool for pregnancy diagnosis and for monitoring fetal viability during pregnancy in buffalo-cows