Study the effect of calf sex in incidence of dystocia in dairy heifers in Balad district

Abstract

The study was conducted at Specialized Clinic in the Genital Diseases and Artificial Insemination in Balad district in Salahalddin province, from 1/6/2011 to 1/6/ 2014. The study included 90 heifers experienced dystocia. The heifers with difficult male births were 60 (66.67%) while the number of heifers with difficult female births was 30 (33.33%), with significant (P< 0.01) difference between the two groups. Heifers have difficult male births with alive male off springs were 24 (40%) whilst the heifers have difficult male births with dead male off springs were 36 (60%). The results showed significant (P< 0.01) difference between them. The number of heifers have difficult female births with alive female off springs was 13 (43.33%), while the heifers have difficult female births with dead female off springs were 17 (56.67%). The difference between these groups was significant (P< 0.05).