Identifying risk factors for early pregnancy loss in Holstein cows
| dc.contributor.author | Ciarletta, Cassandra Dominique, author | |
| dc.contributor.author | Pinedo, Pablo, advisor | |
| dc.contributor.author | Engle, Terry, committee member | |
| dc.contributor.author | Applegate, Tanya, committee member | |
| dc.date.accessioned | 2023-01-21T01:23:57Z | |
| dc.date.available | 2023-01-21T01:23:57Z | |
| dc.date.issued | 2022 | |
| dc.description.abstract | Adequate reproductive performance is a key factor in the success of dairy production. However, events such as early pregnancy loss occur in 15 to 17% of dairy pregnancies and result in diminished fertility and increased culling within herds. Identifying risk factors for pregnancy loss will help farmers use evidence to formulate effective breeding and management protocols to maximize efficiency and welfare. This thesis is focused on identifying risk factors in early pregnancy and explaining the impacts that factors such as body condition and health status pose on the maintenance of pregnancy.Chapter 1 presented relevant literature involving the transition period, reproductive advancements, and reproductive challenges within the dairy industry. The objective of chapter 2 was to characterize the associations between body condition score (BCS) and BCS change, utilizing an automated camera system during early lactation and close to artificial insemination, and pregnancy loss. A secondary objective was to identify the impact of disease on pregnancy loss over multiple periods throughout lactation. Overall, the dynamics of BCS differed between animals that lost pregnancy and those that maintained pregnancy. During the period close to artificial insemination, low BCS, and a significant loss in BCS, as well as disease resulted in higher rates of pregnancy loss. | |
| dc.format.medium | born digital | |
| dc.format.medium | masters theses | |
| dc.identifier | Ciarletta_colostate_0053N_17442.pdf | |
| dc.identifier.uri | https://hdl.handle.net/10217/235927 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation.ispartof | 2020- | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.subject | body condition | |
| dc.subject | automated | |
| dc.subject | pregnancy loss | |
| dc.title | Identifying risk factors for early pregnancy loss in Holstein cows | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). | |
| thesis.degree.discipline | Animal Sciences | |
| thesis.degree.grantor | Colorado State University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Science (M.S.) |
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