| Incorporation of a rapid pregnancy-associated glycoprotein ELISA into a CIDR-Ovsynch resynchronization program for a 28 day re-insemination interval. | |
| | |
MedLine Citation:
|
PMID: 21040959 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
The objective was to compare two resynchronization programs; one that used a blood-based ELISA for pregnancy-associated glycoproteins (PAG) for pregnancy diagnosis so that non-pregnant cows were re-inseminated at 28 d after first TAI, and another that used transrectal ultrasonography for pregnancy diagnosis so that non-pregnant cows were re-inseminated at 35 d after first TAI. The PAG_resynch cows (n = 103) began CIDR-Ovsynch resynchronization on Day 18 after first TAI (Day 0). On Day 25, the CIDR was removed and pregnancy diagnosis with a PAG ELISA was performed. If a cow was not pregnant on Day 25, she was treated with PGF(2α), treated with GnRH 2 d later (Day 27), and TAI on Day 28. Control cows (n = 99) were observed for estrus until Day 25, when they began an identical CIDR-Ovsynch program with pregnancy diagnosis by transrectal ultrasonography on Day 32. If a cow was not pregnant on Day 32, then she was treated with PGF(2α), treated with GnRH 2 d later (Day 34), and TAI on Day 35. There was no difference in pregnancy per AI (P/AI) for either group at first or second insemination. For cows without pregnancy loss, the interval between first and second (P < 0.001) or second and third (P < 0.016) TAI was shorter for PAG_resynch cows compared with Control cows. The interval between first and second or second and third TAI was not different if pregnancy loss cows were included in the analysis. Plasma progesterone concentrations were similar at PGF(2α) treatment, and plasma estradiol concentrations increased similarly after PGF(2α) treatment for PAG_resynch and Control cows. In conclusion, the 28 d CIDR-Ovsynch resynchronization protocol was comparable to a 35 d CIDR-Ovsynch resynchronization protocol that also included estrus detection. Shortened resynchronization protocols that do not require estrus detection may improve reproductive efficiency in dairy cattle. |
| | |
Authors:
|
J C Green; E M Newsom; M C Lucy |
Related Documents
:
|
7085509 - Induction of twins in different breeds of cattle. 1789719 - Effect of pregnancy on body weight and pelvic conformation in crossbred cows (friesian ... 19464119 - Effects of crossbreed pregnancies on the abortion risk of neospora caninum-infected dai... 17183099 - Prevalence and risk factors for postpartum anovulatory condition in dairy cows. 17368739 - Plasma concentrations of pregnancy-associated glycoprotein-1 (pag-1) in high producing ... 16726339 - Occurrence of neonatal and postnatal mortality in range beef cattle. i. calf loss incid... 19217099 - Vitrification of oocytes produces high pregnancy rates when carried out in fertile women. 10472869 - Prognostic markers in twin pregnancies with an acardiac fetus. 8828319 - Use of intrathecal analgesia in a rural hospital. case studies. |
Publication Detail:
|
Type: Journal Article Date: 2010-10-30 |
Journal Detail:
|
Title: Theriogenology Volume: 75 ISSN: 1879-3231 ISO Abbreviation: Theriogenology Publication Date: 2011 Jan |
Date Detail:
|
Created Date: 2010-12-21 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0421510 Medline TA: Theriogenology Country: United States |
Other Details:
|
Languages: eng Pagination: 320-8 Citation Subset: IM |
Copyright Information:
|
Copyright © 2011 Elsevier Inc. All rights reserved. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Effect of storage temperature during transport of ovaries on in vitro embryo production in Iberian r...
Next Document: Sex-sorted bovine spermatozoa and DNA damage: II. Dynamic features.