title: Pregnancy rate of Nelore females inseminated with male-sexed semen.
abstract: Pregnancy rates of Nelore females inseminated with male-sexed semen and conventional semen from the same bulls were evaluated. The females included 433 heifers (2 years old) and 230 non-suckling cows, totaling 663 animals. Average body condition score was 3.5 (1-5 scale). Estrus was induced with prostaglandin F2α. The total pregnancy rate of females inseminated with male-sexed semen of bulls A, B and C was 38.8% (131/338) less (P<0.0001) than the total pregnancy rate observed for females inseminated with conventional semen from the same bulls (57.9% [188/325]). Pregnancy rates of non-suckling cows inseminated with male-sexed semen was 43.3% (49/113), which was similar (P≥0.05) to the values found for heifers inseminated with male-sexed semen from the same bulls (36.4% [82/225]). The pregnancy rate of females inseminated with male-sexed semen was less compared with females inseminated with conventional semen. In addition, there was no significant difference in the pregnancy rate of heifers versus non-suckling cows.
authors.affiliation: Federal University of Mato Grosso do Sul, Faculty of Veterinary Medicine and Animal Science, Av. Filinto Muller 2443, Cidade Universitária, Campo Grande, MS, Brazil.
authors.forename: José Henrique E
authors.initials: JH
authors.lastname: Dominguez
authors.forename: Deiler S
authors.initials: DS
authors.lastname: Costa
authors.forename: Victor Jojot
authors.initials: VJ
authors.lastname: Centurion
authors.forename: Fabio José C
authors.initials: FJ
authors.lastname: Faria
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D015237:Dinoprost / Q000008:administration & dosage; D004971:Estrus / Q000187:drug effects; D005260:Female; D005298:Fertility / Q000187:drug effects / Q000502:physiology; D007315:Insemination, Artificial / Q000379:methods* / Q000662:veterinary; D008297:Male; D011247:Pregnancy; D018873:Pregnancy Rate; D011270:Pregnancy, Animal / Q000502:physiology*; D012661:Semen; D012743:Sex Preselection / Q000379:methods* / Q000662:veterinary
chemical_list: D015237:Dinoprost