Preñez a los 18 meses en las razas Angus, Hereford, Braford y Brangus

The objective of this work was to evaluate the reproductive performance of the Angus, Hereford, Brangus and Braford breeds against an 18 months service under constant conditions in a grazing system. The same was carried out in “La Magdalena” farm, belonging to the firm Los Tordos SA. This property is located 17 km from km. 52 of route 31 in the 12th Police Section of the Department of Salto - Uruguay.

The work was carried out during the year 2022, starting with the practice from March and it should be clarified that all the treatments were under the same conditions.

A sample of 40 heifers of each of the previously mentioned breeds born in the spring of 2020 was used, thus forming a total of 160 animals.

Regarding feeding, the heifers were managed in natural field grazing and 55 days prior to the start of insemination, strategic energy-protein supplementation was implemented to improve body condition and provide microminerals.

With regard to the reproductive issue, two diagnoses of ovarian activity were made and insemination was carried out through a heat synchronization protocol that consists of raising heat for 5 days, synchronizing on day 5 and raising heat for 6 more days in order to cover the entire herd.

The work was carried out during the year 2022, starting with the practice from March and it should be clarified that all the treatments were under the same conditions.

A sample of 40 heifers of each of the previously mentioned breeds born in the spring of 2020 was used, thus forming a total of 160 animals.

Regarding feeding, the heifers were managed in natural field grazing and 55 days prior to the start of insemination, strategic energy-protein supplementation was implemented to improve body condition and provide microminerals.

With regard to the reproductive issue, two diagnoses of ovarian activity were made and insemination was carried out through a heat synchronization protocol that consists of raising heat for 5 days, synchronizing on day 5 and raising heat for 6 more days in order to cover the entire herd.