The aim of this study was to investigate uterus involution and ovarian activity by ultrasonography. The puerperium of fifteen charolais cows was observed from the 8th to 40th day, with interval of 3 days. A Pie Medicai Inc. Scanner Mod. 450 with a 5MHz linear array transducer and a printer were used for ecographic purposes. The uterus complete involution, was detected on the 28.12±1.55 days in the cows with normal parturition and on the 32.57±1.13 days in the cows with dystocia and the lochia was not visualized on the 18.87±1.12 days and 25.28±1.13 day respectively postpartum. The puerperium period was tested by linear and quadratic regression. A high significance was observed, between normal and dystocic parturition on the uterino horn involution (p < 0.0001) and the cérvix (p < 0.01). On the 10th day, great follicles was detected and on the 13th day ovulation was observed without estrous manifestation. The correct monitoration of uterus involution, as well as the lochia and resumption of ovarian function, during the puerperium, is feasible through ultrasonography.
ultrasonography; cow; puerperium
