Comparação do diâmetro do folículo dominante no momento da IATF e do corpo lúteo formado, em diferentes protocolos de sincronização da ovulação em vacas mestiças / Comparison of the diameter of the dominant follicle at the time of TAI and the corpus luteum formed in different synchronization protocols of ovulation in crossbred cows

The beef cattle industry in Brazil is characterized as an activity that goes through a period of growth.The experiment was conducted at the Center of Animal Reproduction Biotechnology (CEBRAN-UFPA), in themunicipality of Castanhal, Pará State. The herd consisted of 24 crossbred cows with body condition scoreranging between 2.5 and 3, 5, divided randomly into 2 groups (G1 and G2) which were managed with differentprotocols. G1 (D0-Be+P4 implant; D7-Pgf2; D9-measurement of the largest follicle + CE + eCG; D11- newmeasurement of FD and D15- verification of the presence or absence of CL and its measurement) G2 (D0-Be +P4 implant, removal of implant D8 + FSH; D9- BE; D10-measurement of FD; D14- verification of the presenceof CL). In the present study was not observed statistical difference for the size of follicular diameter at themoment of TAIF and CL formed in different synchronization protocols.(AU)

Comparação do diâmetro do folículo dominante no momento da IATF e do corpo lúteo formado, em diferentes protocolos de sincronização da ovulação em vacas mestiças / Comparison of the diameter of the dominant follicle at the time of TAI and the corpus luteum formed in different synchronization protocols of ovulation in crossbred cows

The beef cattle industry in Brazil is characterized as an activity that goes through a period of growth.The experiment was conducted at the Center of Animal Reproduction Biotechnology (CEBRAN-UFPA), in themunicipality of Castanhal, Pará State. The herd consisted of 24 crossbred cows with body condition scoreranging between 2.5 and 3, 5, divided randomly into 2 groups (G1 and G2) which were managed with differentprotocols. G1 (D0-Be+P4 implant; D7-Pgf2; D9-measurement of the largest follicle + CE + eCG; D11- newmeasurement of FD and D15- verification of the presence or absence of CL and its measurement) G2 (D0-Be +P4 implant, removal of implant D8 + FSH; D9- BE; D10-measurement of FD; D14- verification of the presenceof CL). In the present study was not observed statistical difference for the size of follicular diameter at themoment of TAIF and CL formed in different synchronization protocols.