Optimization of timing of insemination of dairy heifers inseminated with sex-sorted semen.
Holstein heifer
delayed insemination
sex-sorted semen
Journal
Journal of dairy science
ISSN: 1525-3198
Titre abrégé: J Dairy Sci
Pays: United States
ID NLM: 2985126R
Informations de publication
Date de publication:
Jun 2020
Jun 2020
Historique:
received:
07
11
2019
accepted:
13
01
2020
pubmed:
8
4
2020
medline:
10
10
2020
entrez:
8
4
2020
Statut:
ppublish
Résumé
We hypothesized that delaying by approximately 12 h the artificial insemination (AI) of heifers with sex-sorted semen increases pregnancy per AI (P/AI). Holstein heifers (n = 1,207) were fitted with a collar containing an automated estrus-detection device (HR-LDn tags, SCR Engineers Ltd., Netanya, Israel) at 10.7 ± 0.02 mo of age. Once they reached 330 kg, heifers were enrolled in an ovulation synchronization protocol (5-d Cosynch + controlled internal drug release; Zoetis, Parsippany-Troy Hills, NJ). Study personnel recorded the heifers that were in estrus according to the DataFlow II software (SCR Engineers Ltd., Netanya, Israel) twice daily at 0500 and 1500 h from the day of the first PGF
Identifiants
pubmed: 32253044
pii: S0022-0302(20)30247-2
doi: 10.3168/jds.2019-17870
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5591-5603Informations de copyright
Copyright © 2020 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.