Optimizing the use of sex-sorted sperm in timed artificial insemination programs for suckled beef cows

Optimizing the use of sex-sorted sperm in timed artificial insemination programs for suckled beef cows

Three experiments were designed to evaluate methods to optimize the use of sex-sorted sperm in timed AI (TAI) programs for suckled beef cows. In all 3 experiments, suckled Bos indicus cows were synchronized using an intravaginal progesterone (P4) device during 8 d and a 2.0-mg injection of intramusc...

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Veröffentlicht in:Journal of animal science 2012-06, Vol.90 (6), p.1816-1823
Hauptverfasser: Sá Filho, M F, Girotto, R, Abe, E K, Penteado, L, Campos Filho, E P, Moreno, J F, Sala, R V, Nichi, M, Baruselli, P S
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Animals, Suckling
Cattle
Estrus Synchronization - methods
Female
Insemination, Artificial - methods
Insemination, Artificial - veterinary
Lactation
Male
Pregnancy
Sex Preselection - veterinary
Spermatozoa - physiology
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Zusammenfassung:Three experiments were designed to evaluate methods to optimize the use of sex-sorted sperm in timed AI (TAI) programs for suckled beef cows. In all 3 experiments, suckled Bos indicus cows were synchronized using an intravaginal progesterone (P4) device during 8 d and a 2.0-mg injection of intramuscular estradiol benzoate (EB) at device insertion. The females received PG and eCG (300 IU) at P4 device removal and 1.0 mg of EB 24 h later. The cows were inseminated 60 to 64 h after P4 device withdrawal. All cows had their ovaries scanned by transrectal ultrasound at TAI to indentify and to measure the largest follicle (LF) present. In Exp. 1, a total of 853 cows had their LF classified as
ISSN:1525-3163
DOI:10.2527/jas.2011-4523