HomePhilippine Journal of Veterinary Medicinevol. 54 no. 1 (2017)

Incidence of Right-horn and Left-horn Pregnancies in Locally Raised Holstein-Freisian x Sahiwal Crossbred Dairy Cattle

Antonio A. Rayos

 

Abstract:

The study was conducted to compare the incidence of right-horn and lefthorn pregnancies in Holstein Freisian-Sahiwal dairy cows and heifers. Pregnancy diagnosis was done by rectal palpation. Pregnancies wherein the corpus luteum is on the same side or on the opposite side of the pregnant horn is also presented. Six hundred seventy-eight dairy cows and 178 dairy heifers from four dairy farms in Laguna and Batangas provinces were used in the study. The study showed that 64.2% of the cows examined had right-horn pregnancy which was higher (P<0.05) than left-horn pregnancy at 35.8%. For the heifers, right-horn pregnancy (61.2%) was also higher (P<0.05) than left left-horn pregnancy (38.8%). There was no signifcant difference between right and left-horn pregnancies in the cows and heifers examined. The study also showed that of the 678 cows and 178 heifers, 98.1% and 97.8%, respectively had corpus luteum on the same side of the pregnant horn. These fgures were higher (P<0.05) than the 13 or 1.9% of the pregnant cows and 4 or 2.2% of the heifers with corpus luteum on the opposite side of the pregnant horn. The present study confrms previous fndings that the incidence of right-horn pregnancy is higher than left-horn pregnancy and in almost all cases, the corpus luteum was on the same side of the pregnant horn